The Periodic Table

  • [[
    1 H

    Hydrogen

    1.008
    ->Hydrogen (1)]]
  • [[
    2 He

    Helium

    4.0026022
    ->Helium (2)]]
  • [[
    3 Li

    Lithium

    6.94
    ->Lithium (3)]]
  • [[
    4 Be

    Beryllium

    9.01218315
    ->Beryllium (4)]]
  • [[
    5 B

    Boron

    10.81
    ->Boron (5)]]
  • [[
    6 C

    Carbon

    12.011
    ->Carbon (6)]]
  • [[
    7 N

    Nitrogen

    14.007
    ->Nitrogen (7)]]
  • [[
    8 O

    Oxygen

    15.999
    ->Oxygen (8)]]
  • [[
    9 F

    Fluorine

    18.9984031636
    ->Fluorine (9)]]
  • [[
    10 Ne

    Neon

    20.17976
    ->Neon (10)]]
  • [[
    11 Na

    Sodium

    22.989769282
    ->Sodium (11)]]
  • [[
    12 Mg

    Magnesium

    24.305
    ->Magnesium (12)]]
  • [[
    13 Al

    Aluminium

    26.98153857
    ->Aluminium (13)]]
  • [[
    14 Si

    Silicon

    28.085
    ->Silicon (14)]]
  • [[
    15 P

    Phosphorus

    30.9737619985
    ->Phosphorus (15)]]
  • [[
    16 S

    Sulfur

    32.06
    ->Sulfur (16)]]
  • [[
    17 Cl

    Chlorine

    35.45
    ->Chlorine (17)]]
  • [[
    18 Ar

    Argon

    39.9481
    ->Argon (18)]]
  • [[
    19 K

    Potassium

    39.09831
    ->Potassium (19)]]
  • [[
    20 Ca

    Calcium

    40.0784
    ->Calcium (20)]]
  • [[
    21 Sc

    Scandium

    44.9559085
    ->Scandium (21)]]
  • [[
    22 Ti

    Titanium

    47.8671
    ->Titanium (22)]]
  • [[
    23 V

    Vanadium

    50.94151
    ->Vanadium (23)]]
  • [[
    24 Cr

    Chromium

    51.99616
    ->Chromium (24)]]
  • [[
    25 Mn

    Manganese

    54.9380443
    ->Manganese (25)]]
  • [[
    26 Fe

    Iron

    55.8452
    ->Iron (26)]]
  • [[
    27 Co

    Cobalt

    58.9331944
    ->Cobalt (27)]]
  • [[
    28 Ni

    Nickel

    58.69344
    ->Nickel (28)]]
  • [[
    29 Cu

    Copper

    63.5463
    ->Copper (29)]]
  • [[
    30 Zn

    Zinc

    65.382
    ->Zinc (30)]]
  • [[
    31 Ga

    Gallium

    69.7231
    ->Gallium (31)]]
  • [[
    32 Ge

    Germanium

    72.6308
    ->Germanium (32)]]
  • [[
    33 As

    Arsenic

    74.9215956
    ->Arsenic (33)]]
  • [[
    34 Se

    Selenium

    78.9718
    ->Selenium (34)]]
  • [[
    35 Br

    Bromine

    79.904
    ->Bromine (35)]]
  • [[
    36 Kr

    Krypton

    83.7982
    ->Krypton (36)]]
  • [[
    37 Rb

    Rubidium

    85.46783
    ->Rubidium (37)]]
  • [[
    38 Sr

    Strontium

    87.621
    ->Strontium (38)]]
  • [[
    39 Y

    Yttrium

    88.905842
    ->Yttrium (39)]]
  • [[
    40 Zr

    Zirconium

    91.2242
    ->Zirconium (40)]]
  • [[
    41 Nb

    Niobium

    92.906372
    ->Niobium (41)]]
  • [[
    42 Mo

    Molybdenum

    95.951
    ->Molybdenum (42)]]
  • [[
    43 Tc

    Technetium

    98
    ->Technetium (43)]]
  • [[
    44 Ru

    Ruthenium

    101.072
    ->Ruthenium (44)]]
  • [[
    45 Rh

    Rhodium

    102.905502
    ->Rhodium (45)]]
  • [[
    46 Pd

    Palladium

    106.421
    ->Palladium (46)]]
  • [[
    47 Ag

    Silver

    107.86822
    ->Silver (47)]]
  • [[
    48 Cd

    Cadmium

    112.4144
    ->Cadmium (48)]]
  • [[
    49 In

    Indium

    114.8181
    ->Indium (49)]]
  • [[
    50 Sn

    Tin

    118.7107
    ->Tin (50)]]
  • [[
    51 Sb

    Antimony

    121.7601
    ->Antimony (51)]]
  • [[
    52 Te

    Tellurium

    127.603
    ->Tellurium (52)]]
  • [[
    53 I

    Iodine

    126.904473
    ->Iodine (53)]]
  • [[
    54 Xe

    Xenon

    131.2936
    ->Xenon (54)]]
  • [[
    55 Cs

    Cesium

    132.905451966
    ->Cesium (55)]]
  • [[
    56 Ba

    Barium

    137.3277
    ->Barium (56)]]
  • [[
    57 La

    Lanthanum

    138.905477
    ->Lanthanum (57)]]
  • [[
    58 Ce

    Cerium

    140.1161
    ->Cerium (58)]]
  • [[
    59 Pr

    Praseodymium

    140.907662
    ->Praseodymium (59)]]
  • [[
    60 Nd

    Neodymium

    144.2423
    ->Neodymium (60)]]
  • [[
    61 Pm

    Promethium

    145
    ->Promethium (61)]]
  • [[
    62 Sm

    Samarium

    150.362
    ->Samarium (62)]]
  • [[
    63 Eu

    Europium

    151.9641
    ->Europium (63)]]
  • [[
    64 Gd

    Gadolinium

    157.253
    ->Gadolinium (64)]]
  • [[
    65 Tb

    Terbium

    158.925352
    ->Terbium (65)]]
  • [[
    66 Dy

    Dysprosium

    162.5001
    ->Dysprosium (66)]]
  • [[
    67 Ho

    Holmium

    164.930332
    ->Holmium (67)]]
  • [[
    68 Er

    Erbium

    167.2593
    ->Erbium (68)]]
  • [[
    69 Tm

    Thulium

    168.934222
    ->Thulium (69)]]
  • [[
    70 Yb

    Ytterbium

    173.0451
    ->Ytterbium (70)]]
  • [[
    71 Lu

    Lutetium

    174.96681
    ->Lutetium (71)]]
  • [[
    72 Hf

    Hafnium

    178.492
    ->Hafnium (72)]]
  • [[
    73 Ta

    Tantalum

    180.947882
    ->Tantalum (73)]]
  • [[
    74 W

    Tungsten

    183.841
    ->Tungsten (74)]]
  • [[
    75 Re

    Rhenium

    186.2071
    ->Rhenium (75)]]
  • [[
    76 Os

    Osmium

    190.233
    ->Osmium (76)]]
  • [[
    77 Ir

    Iridium

    192.2173
    ->Iridium (77)]]
  • [[
    78 Pt

    Platinum

    195.0849
    ->Platinum (78)]]
  • [[
    79 Au

    Gold

    196.9665695
    ->Gold (79)]]
  • [[
    80 Hg

    Mercury

    200.5923
    ->Mercury (80)]]
  • [[
    81 Tl

    Thallium

    204.38
    ->Thallium (81)]]
  • [[
    82 Pb

    Lead

    207.21
    ->Lead (82)]]
  • [[
    83 Bi

    Bismuth

    208.980401
    ->Bismuth (83)]]
  • [[
    84 Po

    Polonium

    209
    ->Polonium (84)]]
  • [[
    85 At

    Astatine

    210
    ->Astatine (85)]]
  • [[
    86 Rn

    Radon

    222
    ->Radon (86)]]
  • [[
    87 Fr

    Francium

    223
    ->Francium (87)]]
  • [[
    88 Ra

    Radium

    226
    ->Radium (88)]]
  • [[
    89 Ac

    Actinium

    227
    ->Actinium (89)]]
  • [[
    90 Th

    Thorium

    232.03774
    ->Thorium (90)]]
  • [[
    91 Pa

    Protactinium

    231.035882
    ->Protactinium (91)]]
  • [[
    92 U

    Uranium

    238.028913
    ->Uranium (92)]]
  • [[
    93 Np

    Neptunium

    237
    ->Neptunium (93)]]
  • [[
    94 Pu

    Plutonium

    244
    ->Plutonium (94)]]
  • [[
    95 Am

    Americium

    243
    ->Americium (95)]]
  • [[
    96 Cm

    Curium

    247
    ->Curium (96)]]
  • [[
    97 Bk

    Berkelium

    247
    ->Berkelium (97)]]
  • [[
    98 Cf

    Californium

    251
    ->Californium (98)]]
  • [[
    99 Es

    Einsteinium

    252
    ->Einsteinium (99)]]
  • [[
    100 Fm

    Fermium

    257
    ->Fermium (100)]]
  • [[
    101 Md

    Mendelevium

    258
    ->Mendelevium (101)]]
  • [[
    102 No

    Nobelium

    259
    ->Nobelium (102)]]
  • [[
    103 Lr

    Lawrencium

    266
    ->Lawrencium (103)]]
  • [[
    104 Rf

    Rutherfordium

    267
    ->Rutherfordium (104)]]
  • [[
    105 Db

    Dubnium

    268
    ->Dubnium (105)]]
  • [[
    106 Sg

    Seaborgium

    269
    ->Seaborgium (106)]]
  • [[
    107 Bh

    Bohrium

    270
    ->Bohrium (107)]]
  • [[
    108 Hs

    Hassium

    269
    ->Hassium (108)]]
  • [[
    109 Mt

    Meitnerium

    278
    ->Meitnerium (109)]]
  • [[
    110 Ds

    Darmstadtium

    281
    ->Darmstadtium (110)]]
  • [[
    111 Rg

    Roentgenium

    282
    ->Roentgenium (111)]]
  • [[
    112 Cn

    Copernicium

    285
    ->Copernicium (112)]]
  • [[
    113 Nh

    Nihonium

    286
    ->Nihonium (113)]]
  • [[
    114 Fl

    Flerovium

    289
    ->Flerovium (114)]]
  • [[
    115 Mc

    Moscovium

    289
    ->Moscovium (115)]]
  • [[
    116 Lv

    Livermorium

    293
    ->Livermorium (116)]]
  • [[
    117 Ts

    Tennessine

    294
    ->Tennessine (117)]]
  • [[
    118 Og

    Oganesson

    294
    ->Oganesson (118)]]
(set: _credits to "`[Credits]`") _credits
1 H

Hydrogen

1.008
  • [[
    87 Fr

    Francium

    223
    ->Francium (87)]]
  • [[
    2 He

    Helium

    4.0026022
    ->Helium (2)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    2 He

    Helium

    4.0026022
    ->Helium (2)]]
  • [[
    3 Li

    Lithium

    6.94
    ->Lithium (3)]]
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Watch a video about Hydrogen at Periodic Videos. (set: _credits to "`[Credits]`") _credits
2 He

Helium

4.0026022
  • [[
    118 Og

    Oganesson

    294
    ->Oganesson (118)]]
  • [[
    1 H

    Hydrogen

    1.008
    ->Hydrogen (1)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    1 H

    Hydrogen

    1.008
    ->Hydrogen (1)]]
  • [[
    10 Ne

    Neon

    20.17976
    ->Neon (10)]]
Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among all the elements. Watch a video about Helium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
3 Li

Lithium

6.94
  • [[
    1 H

    Hydrogen

    1.008
    ->Hydrogen (1)]]
  • [[
    10 Ne

    Neon

    20.17976
    ->Neon (10)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    4 Be

    Beryllium

    9.01218315
    ->Beryllium (4)]]
  • [[
    11 Na

    Sodium

    22.989769282
    ->Sodium (11)]]
Lithium ( from Greek : λίθος lithos, "stone") is a chemical element with the symbol Li and atomic number 3. It is a soft, silver-white metal belonging to the alkali metal group of chemical elements. Under standard conditions it is the lightest metal and the least dense solid element. Watch a video about Lithium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
4 Be

Beryllium

9.01218315
  • [[
    88 Ra

    Radium

    226
    ->Radium (88)]]
  • [[
    3 Li

    Lithium

    6.94
    ->Lithium (3)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    5 B

    Boron

    10.81
    ->Boron (5)]]
  • [[
    12 Mg

    Magnesium

    24.305
    ->Magnesium (12)]]
Beryllium is a chemical element with symbol Be and atomic number 4. It is created through stellar nucleosynthesis and is a relatively rare element in the universe. It is a divalent element which occurs naturally only in combination with other elements in minerals. Watch a video about Beryllium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
5 B

Boron

10.81
  • [[
    113 Nh

    Nihonium

    286
    ->Nihonium (113)]]
  • [[
    4 Be

    Beryllium

    9.01218315
    ->Beryllium (4)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    6 C

    Carbon

    12.011
    ->Carbon (6)]]
  • [[
    13 Al

    Aluminium

    26.98153857
    ->Aluminium (13)]]
Boron is a metalloid chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in both the Solar system and the Earth's crust. Boron is concentrated on Earth by the water-solubility of its more common naturally occurring compounds, the borate minerals. Watch a video about Boron at Periodic Videos. (set: _credits to "`[Credits]`") _credits
6 C

Carbon

12.011
  • [[
    114 Fl

    Flerovium

    289
    ->Flerovium (114)]]
  • [[
    5 B

    Boron

    10.81
    ->Boron (5)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    7 N

    Nitrogen

    14.007
    ->Nitrogen (7)]]
  • [[
    14 Si

    Silicon

    28.085
    ->Silicon (14)]]
Carbon ( from Latin : carbo "coal") is a chemical element with symbol C and atomic number 6. On the periodic table, it is the first (row 2) of six elements in column (group) 14, which have in common the composition of their outer electron shell. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Watch a video about Carbon at Periodic Videos. (set: _credits to "`[Credits]`") _credits
7 N

Nitrogen

14.007
  • [[
    115 Mc

    Moscovium

    289
    ->Moscovium (115)]]
  • [[
    6 C

    Carbon

    12.011
    ->Carbon (6)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    8 O

    Oxygen

    15.999
    ->Oxygen (8)]]
  • [[
    15 P

    Phosphorus

    30.9737619985
    ->Phosphorus (15)]]
Nitrogen is a chemical element with symbol N and atomic number 7. It is the lightest pnictogen and at room temperature, it is a transparent, odorless diatomic gas. Nitrogen is a common element in the universe, estimated at about seventh in total abundance in the Milky Way and the Solar System. Watch a video about Nitrogen at Periodic Videos. (set: _credits to "`[Credits]`") _credits
8 O

Oxygen

15.999
  • [[
    116 Lv

    Livermorium

    293
    ->Livermorium (116)]]
  • [[
    7 N

    Nitrogen

    14.007
    ->Nitrogen (7)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    9 F

    Fluorine

    18.9984031636
    ->Fluorine (9)]]
  • [[
    16 S

    Sulfur

    32.06
    ->Sulfur (16)]]
Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetal and oxidizing agent that readily forms compounds (notably oxides) with most elements. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. Watch a video about Oxygen at Periodic Videos. (set: _credits to "`[Credits]`") _credits
9 F

Fluorine

18.9984031636
  • [[
    117 Ts

    Tennessine

    294
    ->Tennessine (117)]]
  • [[
    8 O

    Oxygen

    15.999
    ->Oxygen (8)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    10 Ne

    Neon

    20.17976
    ->Neon (10)]]
  • [[
    17 Cl

    Chlorine

    35.45
    ->Chlorine (17)]]
Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive:almost all other elements, including some noble gases, form compounds with fluorine. Watch a video about Fluorine at Periodic Videos. (set: _credits to "`[Credits]`") _credits
10 Ne

Neon

20.17976
  • [[
    2 He

    Helium

    4.0026022
    ->Helium (2)]]
  • [[
    9 F

    Fluorine

    18.9984031636
    ->Fluorine (9)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    3 Li

    Lithium

    6.94
    ->Lithium (3)]]
  • [[
    18 Ar

    Argon

    39.9481
    ->Argon (18)]]
Neon is a chemical element with symbol Ne and atomic number 10. It is in group 18 (noble gases) of the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. Watch a video about Neon at Periodic Videos. (set: _credits to "`[Credits]`") _credits
11 Na

Sodium

22.989769282
  • [[
    3 Li

    Lithium

    6.94
    ->Lithium (3)]]
  • [[
    18 Ar

    Argon

    39.9481
    ->Argon (18)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    12 Mg

    Magnesium

    24.305
    ->Magnesium (12)]]
  • [[
    19 K

    Potassium

    39.09831
    ->Potassium (19)]]
Sodium /ˈsoʊdiəm/ is a chemical element with symbol Na (from Ancient Greek Νάτριο) and atomic number 11. It is a soft, silver-white, highly reactive metal. In the Periodic table it is in column 1 (alkali metals), and shares with the other six elements in that column that it has a single electron in its outer shell, which it readily donates, creating a positively charged atom - a cation. Watch a video about Sodium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
12 Mg

Magnesium

24.305
  • [[
    4 Be

    Beryllium

    9.01218315
    ->Beryllium (4)]]
  • [[
    11 Na

    Sodium

    22.989769282
    ->Sodium (11)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    13 Al

    Aluminium

    26.98153857
    ->Aluminium (13)]]
  • [[
    20 Ca

    Calcium

    40.0784
    ->Calcium (20)]]
Magnesium is a chemical element with symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column ( Group 2, or alkaline earth metals) of the periodic table : they each have the same electron configuration in their outer electron shell producing a similar crystal structure. Magnesium is the ninth most abundant element in the universe. Watch a video about Magnesium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
13 Al

Aluminium

26.98153857
  • [[
    5 B

    Boron

    10.81
    ->Boron (5)]]
  • [[
    12 Mg

    Magnesium

    24.305
    ->Magnesium (12)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    14 Si

    Silicon

    28.085
    ->Silicon (14)]]
  • [[
    31 Ga

    Gallium

    69.7231
    ->Gallium (31)]]
Aluminium (or aluminum; see different endings) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal, in the Earth's crust. Watch a video about Aluminium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
14 Si

Silicon

28.085
  • [[
    6 C

    Carbon

    12.011
    ->Carbon (6)]]
  • [[
    13 Al

    Aluminium

    26.98153857
    ->Aluminium (13)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    15 P

    Phosphorus

    30.9737619985
    ->Phosphorus (15)]]
  • [[
    32 Ge

    Germanium

    72.6308
    ->Germanium (32)]]
Silicon is a chemical element with symbol Si and atomic number 14. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table. Controversy about silicon's character dates to its discovery. Watch a video about Silicon at Periodic Videos. (set: _credits to "`[Credits]`") _credits
15 P

Phosphorus

30.9737619985
  • [[
    7 N

    Nitrogen

    14.007
    ->Nitrogen (7)]]
  • [[
    14 Si

    Silicon

    28.085
    ->Silicon (14)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    16 S

    Sulfur

    32.06
    ->Sulfur (16)]]
  • [[
    33 As

    Arsenic

    74.9215956
    ->Arsenic (33)]]
Phosphorus is a chemical element with symbol P and atomic number 15. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but due to its high reactivity, phosphorus is never found as a free element on Earth. Instead phosphorus-containing minerals are almost always present in their maximally oxidised state, as inorganic phosphate rocks. Watch a video about Phosphorus at Periodic Videos. (set: _credits to "`[Credits]`") _credits
16 S

Sulfur

32.06
  • [[
    8 O

    Oxygen

    15.999
    ->Oxygen (8)]]
  • [[
    15 P

    Phosphorus

    30.9737619985
    ->Phosphorus (15)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    17 Cl

    Chlorine

    35.45
    ->Chlorine (17)]]
  • [[
    34 Se

    Selenium

    78.9718
    ->Selenium (34)]]
Sulfur or sulphur (see spelling differences) is a chemical element with symbol S and atomic number 16. It is an abundant, multivalent non-metal. Under normal conditions, sulfur atoms form cyclic octatomic molecules with chemical formula S8. Watch a video about Sulfur at Periodic Videos. (set: _credits to "`[Credits]`") _credits
17 Cl

Chlorine

35.45
  • [[
    9 F

    Fluorine

    18.9984031636
    ->Fluorine (9)]]
  • [[
    16 S

    Sulfur

    32.06
    ->Sulfur (16)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    18 Ar

    Argon

    39.9481
    ->Argon (18)]]
  • [[
    35 Br

    Bromine

    79.904
    ->Bromine (35)]]
Chlorine is a chemical element with symbol Cl and atomic number 17. It also has a relative atomic mass of 35.5. Chlorine is in the halogen group (17) and is the second lightest halogen following fluorine. Watch a video about Chlorine at Periodic Videos. (set: _credits to "`[Credits]`") _credits
18 Ar

Argon

39.9481
  • [[
    10 Ne

    Neon

    20.17976
    ->Neon (10)]]
  • [[
    17 Cl

    Chlorine

    35.45
    ->Chlorine (17)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    11 Na

    Sodium

    22.989769282
    ->Sodium (11)]]
  • [[
    36 Kr

    Krypton

    83.7982
    ->Krypton (36)]]
Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third most common gas in the Earth's atmosphere, at 0.934% (9,340 ppmv), making it over twice as abundant as the next most common atmospheric gas, water vapor (which averages about 4000 ppmv, but varies greatly), and 23 times as abundant as the next most common non-condensing atmospheric gas, carbon dioxide (400 ppmv), and more than 500 times as abundant as the next most common noble gas, neon (18 ppmv). Watch a video about Argon at Periodic Videos. (set: _credits to "`[Credits]`") _credits
19 K

Potassium

39.09831
  • [[
    11 Na

    Sodium

    22.989769282
    ->Sodium (11)]]
  • [[
    36 Kr

    Krypton

    83.7982
    ->Krypton (36)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    20 Ca

    Calcium

    40.0784
    ->Calcium (20)]]
  • [[
    37 Rb

    Rubidium

    85.46783
    ->Rubidium (37)]]
Potassium is a chemical element with symbol K ( derived from Neo-Latin, kalium) and atomic number 19. It was first isolated from potash, the ashes of plants, from which its name is derived. In the Periodic table, potassium is one of seven elements in column (group) 1 (alkali metals) : they all have a single valence electron in their outer electron shell, which they readily give up to create an atom with a positive charge - a cation, and combine with anions to form salts. Watch a video about Potassium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
20 Ca

Calcium

40.0784
  • [[
    12 Mg

    Magnesium

    24.305
    ->Magnesium (12)]]
  • [[
    19 K

    Potassium

    39.09831
    ->Potassium (19)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    21 Sc

    Scandium

    44.9559085
    ->Scandium (21)]]
  • [[
    38 Sr

    Strontium

    87.621
    ->Strontium (38)]]
Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth's crust. The ion Ca2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate. Watch a video about Calcium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
21 Sc

Scandium

44.9559085
  • [[
    103 Lr

    Lawrencium

    266
    ->Lawrencium (103)]]
  • [[
    20 Ca

    Calcium

    40.0784
    ->Calcium (20)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    22 Ti

    Titanium

    47.8671
    ->Titanium (22)]]
  • [[
    39 Y

    Yttrium

    88.905842
    ->Yttrium (39)]]
Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia. Watch a video about Scandium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
22 Ti

Titanium

47.8671
  • [[
    104 Rf

    Rutherfordium

    267
    ->Rutherfordium (104)]]
  • [[
    21 Sc

    Scandium

    44.9559085
    ->Scandium (21)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    23 V

    Vanadium

    50.94151
    ->Vanadium (23)]]
  • [[
    40 Zr

    Zirconium

    91.2242
    ->Zirconium (40)]]
Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density and high strength. It is highly resistant to corrosion in sea water, aqua regia and chlorine. Watch a video about Titanium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
23 V

Vanadium

50.94151
  • [[
    105 Db

    Dubnium

    268
    ->Dubnium (105)]]
  • [[
    22 Ti

    Titanium

    47.8671
    ->Titanium (22)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    24 Cr

    Chromium

    51.99616
    ->Chromium (24)]]
  • [[
    41 Nb

    Niobium

    92.906372
    ->Niobium (41)]]
Vanadium is a chemical element with symbol V and atomic number 23. It is a hard, silvery grey, ductile and malleable transition metal. The element is found only in chemically combined form in nature, but once isolated artificially, the formation of an oxide layer stabilizes the free metal somewhat against further oxidation. Watch a video about Vanadium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
24 Cr

Chromium

51.99616
  • [[
    106 Sg

    Seaborgium

    269
    ->Seaborgium (106)]]
  • [[
    23 V

    Vanadium

    50.94151
    ->Vanadium (23)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    25 Mn

    Manganese

    54.9380443
    ->Manganese (25)]]
  • [[
    42 Mo

    Molybdenum

    95.951
    ->Molybdenum (42)]]
Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point. Watch a video about Chromium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
25 Mn

Manganese

54.9380443
  • [[
    107 Bh

    Bohrium

    270
    ->Bohrium (107)]]
  • [[
    24 Cr

    Chromium

    51.99616
    ->Chromium (24)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    26 Fe

    Iron

    55.8452
    ->Iron (26)]]
  • [[
    43 Tc

    Technetium

    98
    ->Technetium (43)]]
Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in combination with iron, and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Watch a video about Manganese at Periodic Videos. (set: _credits to "`[Credits]`") _credits
26 Fe

Iron

55.8452
  • [[
    108 Hs

    Hassium

    269
    ->Hassium (108)]]
  • [[
    25 Mn

    Manganese

    54.9380443
    ->Manganese (25)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    27 Co

    Cobalt

    58.9331944
    ->Cobalt (27)]]
  • [[
    44 Ru

    Ruthenium

    101.072
    ->Ruthenium (44)]]
Iron is a chemical element with symbol Fe ( from Latin : ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core. Watch a video about Iron at Periodic Videos. (set: _credits to "`[Credits]`") _credits
27 Co

Cobalt

58.9331944
  • [[
    109 Mt

    Meitnerium

    278
    ->Meitnerium (109)]]
  • [[
    26 Fe

    Iron

    55.8452
    ->Iron (26)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    28 Ni

    Nickel

    58.69344
    ->Nickel (28)]]
  • [[
    45 Rh

    Rhodium

    102.905502
    ->Rhodium (45)]]
Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt in the Earth's crust is found only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Watch a video about Cobalt at Periodic Videos. (set: _credits to "`[Credits]`") _credits
28 Ni

Nickel

58.69344
  • [[
    110 Ds

    Darmstadtium

    281
    ->Darmstadtium (110)]]
  • [[
    27 Co

    Cobalt

    58.9331944
    ->Cobalt (27)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    29 Cu

    Copper

    63.5463
    ->Copper (29)]]
  • [[
    46 Pd

    Palladium

    106.421
    ->Palladium (46)]]
Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile. Watch a video about Nickel at Periodic Videos. (set: _credits to "`[Credits]`") _credits
29 Cu

Copper

63.5463
  • [[
    111 Rg

    Roentgenium

    282
    ->Roentgenium (111)]]
  • [[
    28 Ni

    Nickel

    58.69344
    ->Nickel (28)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    30 Zn

    Zinc

    65.382
    ->Zinc (30)]]
  • [[
    47 Ag

    Silver

    107.86822
    ->Silver (47)]]
Copper is a chemical element with symbol Cu ( from Latin : cuprum) and atomic number 29. It is a soft, malleable and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color. Watch a video about Copper at Periodic Videos. (set: _credits to "`[Credits]`") _credits
30 Zn

Zinc

65.382
  • [[
    112 Cn

    Copernicium

    285
    ->Copernicium (112)]]
  • [[
    29 Cu

    Copper

    63.5463
    ->Copper (29)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    31 Ga

    Gallium

    69.7231
    ->Gallium (31)]]
  • [[
    48 Cd

    Cadmium

    112.4144
    ->Cadmium (48)]]
Zinc, in commerce also spelter, is a chemical element with symbol Zn and atomic number 30. It is the first element of group 12 of the periodic table. In some respects zinc is chemically similar to magnesium:its ion is of similar size and its only common oxidation state is +2. Watch a video about Zinc at Periodic Videos. (set: _credits to "`[Credits]`") _credits
31 Ga

Gallium

69.7231
  • [[
    13 Al

    Aluminium

    26.98153857
    ->Aluminium (13)]]
  • [[
    30 Zn

    Zinc

    65.382
    ->Zinc (30)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    32 Ge

    Germanium

    72.6308
    ->Germanium (32)]]
  • [[
    49 In

    Indium

    114.8181
    ->Indium (49)]]
Gallium is a chemical element with symbol Ga and atomic number 31. Elemental gallium does not occur in free form in nature, but as the gallium(III) compounds that are in trace amounts in zinc ores and in bauxite. Gallium is a soft, silvery metal, and elemental gallium is a brittle solid at low temperatures, and melts at 29.76 °C (85.57 °F) (slightly above room temperature). Watch a video about Gallium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
32 Ge

Germanium

72.6308
  • [[
    14 Si

    Silicon

    28.085
    ->Silicon (14)]]
  • [[
    31 Ga

    Gallium

    69.7231
    ->Gallium (31)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    33 As

    Arsenic

    74.9215956
    ->Arsenic (33)]]
  • [[
    50 Sn

    Tin

    118.7107
    ->Tin (50)]]
Germanium is a chemical element with symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Purified germanium is a semiconductor, with an appearance most similar to elemental silicon. Watch a video about Germanium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
33 As

Arsenic

74.9215956
  • [[
    15 P

    Phosphorus

    30.9737619985
    ->Phosphorus (15)]]
  • [[
    32 Ge

    Germanium

    72.6308
    ->Germanium (32)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    34 Se

    Selenium

    78.9718
    ->Selenium (34)]]
  • [[
    51 Sb

    Antimony

    121.7601
    ->Antimony (51)]]
Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. Arsenic is a metalloid. Watch a video about Arsenic at Periodic Videos. (set: _credits to "`[Credits]`") _credits
34 Se

Selenium

78.9718
  • [[
    16 S

    Sulfur

    32.06
    ->Sulfur (16)]]
  • [[
    33 As

    Arsenic

    74.9215956
    ->Arsenic (33)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    35 Br

    Bromine

    79.904
    ->Bromine (35)]]
  • [[
    52 Te

    Tellurium

    127.603
    ->Tellurium (52)]]
Selenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between those of its periodic table column-adjacent chalcogen elements sulfur and tellurium. It rarely occurs in its elemental state in nature, or as pure ore compounds. Watch a video about Selenium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
35 Br

Bromine

79.904
  • [[
    17 Cl

    Chlorine

    35.45
    ->Chlorine (17)]]
  • [[
    34 Se

    Selenium

    78.9718
    ->Selenium (34)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    36 Kr

    Krypton

    83.7982
    ->Krypton (36)]]
  • [[
    53 I

    Iodine

    126.904473
    ->Iodine (53)]]
Bromine ( from Ancient Greek : βρῶμος, brómos, meaning "stench") is a chemical element with symbol Br, and atomic number 35. It is a halogen. The element was isolated independently by two chemists, Carl Jacob Löwig and Antoine Jerome Balard, in 1825–1826. Watch a video about Bromine at Periodic Videos. (set: _credits to "`[Credits]`") _credits
36 Kr

Krypton

83.7982
  • [[
    18 Ar

    Argon

    39.9481
    ->Argon (18)]]
  • [[
    35 Br

    Bromine

    79.904
    ->Bromine (35)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    19 K

    Potassium

    39.09831
    ->Potassium (19)]]
  • [[
    54 Xe

    Xenon

    131.2936
    ->Xenon (54)]]
Krypton ( from Greek : κρυπτός kryptos "the hidden one") is a chemical element with symbol Kr and atomic number 36. It is a member of group 18 (noble gases) elements. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionally distilling liquefied air, and is often used with other rare gases in fluorescent lamps. Watch a video about Krypton at Periodic Videos. (set: _credits to "`[Credits]`") _credits
37 Rb

Rubidium

85.46783
  • [[
    19 K

    Potassium

    39.09831
    ->Potassium (19)]]
  • [[
    54 Xe

    Xenon

    131.2936
    ->Xenon (54)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    38 Sr

    Strontium

    87.621
    ->Strontium (38)]]
  • [[
    55 Cs

    Cesium

    132.905451966
    ->Cesium (55)]]
Rubidium is a chemical element with symbol Rb and atomic number 37. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, such as very rapid oxidation in air. Watch a video about Rubidium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
38 Sr

Strontium

87.621
  • [[
    20 Ca

    Calcium

    40.0784
    ->Calcium (20)]]
  • [[
    37 Rb

    Rubidium

    85.46783
    ->Rubidium (37)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    39 Y

    Yttrium

    88.905842
    ->Yttrium (39)]]
  • [[
    56 Ba

    Barium

    137.3277
    ->Barium (56)]]
Strontium is a chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when it is exposed to air. Watch a video about Strontium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
39 Y

Yttrium

88.905842
  • [[
    21 Sc

    Scandium

    44.9559085
    ->Scandium (21)]]
  • [[
    38 Sr

    Strontium

    87.621
    ->Strontium (38)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    40 Zr

    Zirconium

    91.2242
    ->Zirconium (40)]]
  • [[
    71 Lu

    Lutetium

    174.96681
    ->Lutetium (71)]]
Yttrium is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and it has often been classified as a "rare earth element". Yttrium is almost always found combined with the lanthanides in rare earth minerals and is never found in nature as a free element. Watch a video about Yttrium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
40 Zr

Zirconium

91.2242
  • [[
    22 Ti

    Titanium

    47.8671
    ->Titanium (22)]]
  • [[
    39 Y

    Yttrium

    88.905842
    ->Yttrium (39)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    41 Nb

    Niobium

    92.906372
    ->Niobium (41)]]
  • [[
    72 Hf

    Hafnium

    178.492
    ->Hafnium (72)]]
Zirconium is a chemical element with symbol Zr and atomic number 40. The name of zirconium is taken from the name of the mineral zircon, the most important source of zirconium. The word zircon comes from the Persian word zargun زرگون, meaning "gold-colored". Watch a video about Zirconium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
41 Nb

Niobium

92.906372
  • [[
    23 V

    Vanadium

    50.94151
    ->Vanadium (23)]]
  • [[
    40 Zr

    Zirconium

    91.2242
    ->Zirconium (40)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    42 Mo

    Molybdenum

    95.951
    ->Molybdenum (42)]]
  • [[
    73 Ta

    Tantalum

    180.947882
    ->Tantalum (73)]]
Niobium, formerly columbium, is a chemical element with symbol Nb ( formerly Cb) and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. The name comes from Greek mythology : Niobe, daughter of Tantalus since it is so similar to tantalum. Watch a video about Niobium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
42 Mo

Molybdenum

95.951
  • [[
    24 Cr

    Chromium

    51.99616
    ->Chromium (24)]]
  • [[
    41 Nb

    Niobium

    92.906372
    ->Niobium (41)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    43 Tc

    Technetium

    98
    ->Technetium (43)]]
  • [[
    74 W

    Tungsten

    183.841
    ->Tungsten (74)]]
Molybdenum is a chemical element with symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts of other metals) in 1778 by Carl Wilhelm Scheele. Watch a video about Molybdenum at Periodic Videos. (set: _credits to "`[Credits]`") _credits
43 Tc

Technetium

98
  • [[
    25 Mn

    Manganese

    54.9380443
    ->Manganese (25)]]
  • [[
    42 Mo

    Molybdenum

    95.951
    ->Molybdenum (42)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    44 Ru

    Ruthenium

    101.072
    ->Ruthenium (44)]]
  • [[
    75 Re

    Rhenium

    186.2071
    ->Rhenium (75)]]
Technetium ( /tɛkˈniːʃiəm/) is a chemical element with symbol Tc and atomic number 43. It is the element with the lowest atomic number in the periodic table that has no stable isotopes : every form of it is radioactive. Nearly all technetium is produced synthetically, and only minute amounts are found in nature. Watch a video about Technetium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
44 Ru

Ruthenium

101.072
  • [[
    26 Fe

    Iron

    55.8452
    ->Iron (26)]]
  • [[
    43 Tc

    Technetium

    98
    ->Technetium (43)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    45 Rh

    Rhodium

    102.905502
    ->Rhodium (45)]]
  • [[
    76 Os

    Osmium

    190.233
    ->Osmium (76)]]
Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. Watch a video about Ruthenium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
45 Rh

Rhodium

102.905502
  • [[
    27 Co

    Cobalt

    58.9331944
    ->Cobalt (27)]]
  • [[
    44 Ru

    Ruthenium

    101.072
    ->Ruthenium (44)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    46 Pd

    Palladium

    106.421
    ->Palladium (46)]]
  • [[
    77 Ir

    Iridium

    192.2173
    ->Iridium (77)]]
Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, and chemically inert transition metal. It is a member of the platinum group. Watch a video about Rhodium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
46 Pd

Palladium

106.421
  • [[
    28 Ni

    Nickel

    58.69344
    ->Nickel (28)]]
  • [[
    45 Rh

    Rhodium

    102.905502
    ->Rhodium (45)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    47 Ag

    Silver

    107.86822
    ->Silver (47)]]
  • [[
    78 Pt

    Platinum

    195.0849
    ->Platinum (78)]]
Palladium is a chemical element with symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas. Watch a video about Palladium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
47 Ag

Silver

107.86822
  • [[
    29 Cu

    Copper

    63.5463
    ->Copper (29)]]
  • [[
    46 Pd

    Palladium

    106.421
    ->Palladium (46)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    48 Cd

    Cadmium

    112.4144
    ->Cadmium (48)]]
  • [[
    79 Au

    Gold

    196.9665695
    ->Gold (79)]]
Silver is a chemical element with symbol Ag ( Greek : άργυρος árguros, Latin:argentum, both from the Indo-European root *h₂erǵ- for "grey" or "shining") and atomic number 47. A soft, white, lustrous transition metal, it possesses the highest electrical conductivity, thermal conductivity and reflectivity of any metal. The metal occurs naturally in its pure, free form (native silver), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Watch a video about Silver at Periodic Videos. (set: _credits to "`[Credits]`") _credits
48 Cd

Cadmium

112.4144
  • [[
    30 Zn

    Zinc

    65.382
    ->Zinc (30)]]
  • [[
    47 Ag

    Silver

    107.86822
    ->Silver (47)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    49 In

    Indium

    114.8181
    ->Indium (49)]]
  • [[
    80 Hg

    Mercury

    200.5923
    ->Mercury (80)]]
Cadmium is a chemical element with symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it prefers oxidation state +2 in most of its compounds and like mercury it shows a low melting point compared to transition metals. Watch a video about Cadmium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
49 In

Indium

114.8181
  • [[
    31 Ga

    Gallium

    69.7231
    ->Gallium (31)]]
  • [[
    48 Cd

    Cadmium

    112.4144
    ->Cadmium (48)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    50 Sn

    Tin

    118.7107
    ->Tin (50)]]
  • [[
    81 Tl

    Thallium

    204.38
    ->Thallium (81)]]
Indium is a chemical element with symbol In and atomic number 49. It is a post-transition metallic element that is rare in Earth's crust. The metal is very soft, malleable and easily fusible, with a melting point higher than sodium, but lower than lithium or tin. Watch a video about Indium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
50 Sn

Tin

118.7107
  • [[
    32 Ge

    Germanium

    72.6308
    ->Germanium (32)]]
  • [[
    49 In

    Indium

    114.8181
    ->Indium (49)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    51 Sb

    Antimony

    121.7601
    ->Antimony (51)]]
  • [[
    82 Pb

    Lead

    207.21
    ->Lead (82)]]
Tin is a chemical element with the symbol Sn ( for Latin : stannum) and atomic number 50. It is a main group metal in group 14 of the periodic table. Tin shows a chemical similarity to both neighboring group-14 elements, germanium and lead, and has two possible oxidation states, +2 and the slightly more stable +4. Watch a video about Tin at Periodic Videos. (set: _credits to "`[Credits]`") _credits
51 Sb

Antimony

121.7601
  • [[
    33 As

    Arsenic

    74.9215956
    ->Arsenic (33)]]
  • [[
    50 Sn

    Tin

    118.7107
    ->Tin (50)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    52 Te

    Tellurium

    127.603
    ->Tellurium (52)]]
  • [[
    83 Bi

    Bismuth

    208.980401
    ->Bismuth (83)]]
Antimony is a chemical element with symbol Sb ( from Latin : stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead upon its discovery. Watch a video about Antimony at Periodic Videos. (set: _credits to "`[Credits]`") _credits
52 Te

Tellurium

127.603
  • [[
    34 Se

    Selenium

    78.9718
    ->Selenium (34)]]
  • [[
    51 Sb

    Antimony

    121.7601
    ->Antimony (51)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    53 I

    Iodine

    126.904473
    ->Iodine (53)]]
  • [[
    84 Po

    Polonium

    209
    ->Polonium (84)]]
Tellurium is a chemical element with symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur. Watch a video about Tellurium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
53 I

Iodine

126.904473
  • [[
    35 Br

    Bromine

    79.904
    ->Bromine (35)]]
  • [[
    52 Te

    Tellurium

    127.603
    ->Tellurium (52)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    54 Xe

    Xenon

    131.2936
    ->Xenon (54)]]
  • [[
    85 At

    Astatine

    210
    ->Astatine (85)]]
Iodine is a chemical element with symbol I and atomic number 53. The name is from Greek ἰοειδής ioeidēs, meaning violet or purple, due to the color of iodine vapor. Iodine and its compounds are primarily used in nutrition, and industrially in the production of acetic acid and certain polymers. Watch a video about Iodine at Periodic Videos. (set: _credits to "`[Credits]`") _credits
54 Xe

Xenon

131.2936
  • [[
    36 Kr

    Krypton

    83.7982
    ->Krypton (36)]]
  • [[
    53 I

    Iodine

    126.904473
    ->Iodine (53)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    37 Rb

    Rubidium

    85.46783
    ->Rubidium (37)]]
  • [[
    86 Rn

    Radon

    222
    ->Radon (86)]]
Xenon is a chemical element with symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas, that occurs in the Earth's atmosphere in trace amounts. Although generally unreactive, xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized. Watch a video about Xenon at Periodic Videos. (set: _credits to "`[Credits]`") _credits
55 Cs

Cesium

132.905451966
  • [[
    37 Rb

    Rubidium

    85.46783
    ->Rubidium (37)]]
  • [[
    86 Rn

    Radon

    222
    ->Radon (86)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    56 Ba

    Barium

    137.3277
    ->Barium (56)]]
  • [[
    87 Fr

    Francium

    223
    ->Francium (87)]]
Caesium or cesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (82 °F), which makes it one of only five elemental metals that are liquid at or near room temperature. Caesium is an alkali metal and has physical and chemical properties similar to those of rubidium and potassium. Watch a video about Cesium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
56 Ba

Barium

137.3277
  • [[
    38 Sr

    Strontium

    87.621
    ->Strontium (38)]]
  • [[
    55 Cs

    Cesium

    132.905451966
    ->Cesium (55)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    57 La

    Lanthanum

    138.905477
    ->Lanthanum (57)]]
  • [[
    88 Ra

    Radium

    226
    ->Radium (88)]]
Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Because of its high chemical reactivity barium is never found in nature as a free element. Watch a video about Barium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
57 La

Lanthanum

138.905477
  • [[
    89 Ac

    Actinium

    227
    ->Actinium (89)]]
  • [[
    56 Ba

    Barium

    137.3277
    ->Barium (56)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    58 Ce

    Cerium

    140.1161
    ->Cerium (58)]]
  • [[
    89 Ac

    Actinium

    227
    ->Actinium (89)]]
Lanthanum is a soft, ductile, silvery-white metallic chemical element with symbol La and atomic number 57. It tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. It gave its name to the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table:it is also sometimes considered the first element of the 6th-period transition metals. Watch a video about Lanthanum at Periodic Videos. (set: _credits to "`[Credits]`") _credits
58 Ce

Cerium

140.1161
  • [[
    90 Th

    Thorium

    232.03774
    ->Thorium (90)]]
  • [[
    57 La

    Lanthanum

    138.905477
    ->Lanthanum (57)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    59 Pr

    Praseodymium

    140.907662
    ->Praseodymium (59)]]
  • [[
    90 Th

    Thorium

    232.03774
    ->Thorium (90)]]
Cerium is a chemical element with symbol Ce and atomic number 58. It is a soft, silvery, ductile metal which easily oxidizes in air. Cerium was named after the dwarf planet Ceres (itself named after the Roman goddess of agriculture). Watch a video about Cerium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
59 Pr

Praseodymium

140.907662
  • [[
    91 Pa

    Protactinium

    231.035882
    ->Protactinium (91)]]
  • [[
    58 Ce

    Cerium

    140.1161
    ->Cerium (58)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    60 Nd

    Neodymium

    144.2423
    ->Neodymium (60)]]
  • [[
    91 Pa

    Protactinium

    231.035882
    ->Protactinium (91)]]
Praseodymium is a chemical element with symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group. It is valued for its magnetic, electrical, chemical, and optical properties. Watch a video about Praseodymium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
60 Nd

Neodymium

144.2423
  • [[
    92 U

    Uranium

    238.028913
    ->Uranium (92)]]
  • [[
    59 Pr

    Praseodymium

    140.907662
    ->Praseodymium (59)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    61 Pm

    Promethium

    145
    ->Promethium (61)]]
  • [[
    92 U

    Uranium

    238.028913
    ->Uranium (92)]]
Neodymium is a chemical element with symbol Nd and atomic number 60. It is a soft silvery metal that tarnishes in air. Neodymium was discovered in 1885 by the Austrian chemist Carl Auer von Welsbach. Watch a video about Neodymium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
61 Pm

Promethium

145
  • [[
    93 Np

    Neptunium

    237
    ->Neptunium (93)]]
  • [[
    60 Nd

    Neodymium

    144.2423
    ->Neodymium (60)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    62 Sm

    Samarium

    150.362
    ->Samarium (62)]]
  • [[
    93 Np

    Neptunium

    237
    ->Neptunium (93)]]
Promethium, originally prometheum, is a chemical element with the symbol Pm and atomic number 61. All of its isotopes are radioactive; it is one of only two such elements that are followed in the periodic table by elements with stable forms, a distinction shared with technetium. Chemically, promethium is a lanthanide, which forms salts when combined with other elements. Watch a video about Promethium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
62 Sm

Samarium

150.362
  • [[
    94 Pu

    Plutonium

    244
    ->Plutonium (94)]]
  • [[
    61 Pm

    Promethium

    145
    ->Promethium (61)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    63 Eu

    Europium

    151.9641
    ->Europium (63)]]
  • [[
    94 Pu

    Plutonium

    244
    ->Plutonium (94)]]
Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that readily oxidizes in air. Being a typical member of the lanthanide series, samarium usually assumes the oxidation state +3. Watch a video about Samarium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
63 Eu

Europium

151.9641
  • [[
    95 Am

    Americium

    243
    ->Americium (95)]]
  • [[
    62 Sm

    Samarium

    150.362
    ->Samarium (62)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    64 Gd

    Gadolinium

    157.253
    ->Gadolinium (64)]]
  • [[
    95 Am

    Americium

    243
    ->Americium (95)]]
Europium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent of Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water. Watch a video about Europium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
64 Gd

Gadolinium

157.253
  • [[
    96 Cm

    Curium

    247
    ->Curium (96)]]
  • [[
    63 Eu

    Europium

    151.9641
    ->Europium (63)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    65 Tb

    Terbium

    158.925352
    ->Terbium (65)]]
  • [[
    96 Cm

    Curium

    247
    ->Curium (96)]]
Gadolinium is a chemical element with symbol Gd and atomic number 64. It is a silvery-white, malleable and ductile rare-earth metal. It is found in nature only in combined (salt) form. Watch a video about Gadolinium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
65 Tb

Terbium

158.925352
  • [[
    97 Bk

    Berkelium

    247
    ->Berkelium (97)]]
  • [[
    64 Gd

    Gadolinium

    157.253
    ->Gadolinium (64)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    66 Dy

    Dysprosium

    162.5001
    ->Dysprosium (66)]]
  • [[
    97 Bk

    Berkelium

    247
    ->Berkelium (97)]]
Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite. Watch a video about Terbium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
66 Dy

Dysprosium

162.5001
  • [[
    98 Cf

    Californium

    251
    ->Californium (98)]]
  • [[
    65 Tb

    Terbium

    158.925352
    ->Terbium (65)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    67 Ho

    Holmium

    164.930332
    ->Holmium (67)]]
  • [[
    98 Cf

    Californium

    251
    ->Californium (98)]]
Dysprosium is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime. Watch a video about Dysprosium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
67 Ho

Holmium

164.930332
  • [[
    99 Es

    Einsteinium

    252
    ->Einsteinium (99)]]
  • [[
    66 Dy

    Dysprosium

    162.5001
    ->Dysprosium (66)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    68 Er

    Erbium

    167.2593
    ->Erbium (68)]]
  • [[
    99 Es

    Einsteinium

    252
    ->Einsteinium (99)]]
Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve. Watch a video about Holmium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
68 Er

Erbium

167.2593
  • [[
    100 Fm

    Fermium

    257
    ->Fermium (100)]]
  • [[
    67 Ho

    Holmium

    164.930332
    ->Holmium (67)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    69 Tm

    Thulium

    168.934222
    ->Thulium (69)]]
  • [[
    100 Fm

    Fermium

    257
    ->Fermium (100)]]
Erbium is a chemical element in the lanthanide series, with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements on Earth. As such, it is a rare earth element which is associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden, where yttrium, ytterbium, and terbium were discovered. Watch a video about Erbium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
69 Tm

Thulium

168.934222
  • [[
    101 Md

    Mendelevium

    258
    ->Mendelevium (101)]]
  • [[
    68 Er

    Erbium

    167.2593
    ->Erbium (68)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    70 Yb

    Ytterbium

    173.0451
    ->Ytterbium (70)]]
  • [[
    101 Md

    Mendelevium

    258
    ->Mendelevium (101)]]
Thulium is a chemical element with symbol Tm and atomic number 69. It is the thirteenth and antepenultimate (third-last) element in the lanthanide series. Like the other lanthanides, the most common oxidation state is +3, seen in its oxide, halides and other compounds. Watch a video about Thulium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
70 Yb

Ytterbium

173.0451
  • [[
    102 No

    Nobelium

    259
    ->Nobelium (102)]]
  • [[
    69 Tm

    Thulium

    168.934222
    ->Thulium (69)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    71 Lu

    Lutetium

    174.96681
    ->Lutetium (71)]]
  • [[
    102 No

    Nobelium

    259
    ->Nobelium (102)]]
Ytterbium is a chemical element with symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state. However, like the other lanthanides, its most common oxidation state is +3, seen in its oxide, halides and other compounds. Watch a video about Ytterbium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
71 Lu

Lutetium

174.96681
  • [[
    39 Y

    Yttrium

    88.905842
    ->Yttrium (39)]]
  • [[
    70 Yb

    Ytterbium

    173.0451
    ->Ytterbium (70)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    72 Hf

    Hafnium

    178.492
    ->Hafnium (72)]]
  • [[
    103 Lr

    Lawrencium

    266
    ->Lawrencium (103)]]
Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry, but not in moist air. It is considered the first element of the 6th-period transition metals and the last element in the lanthanide series, and is traditionally counted among the rare earths. Watch a video about Lutetium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
72 Hf

Hafnium

178.492
  • [[
    40 Zr

    Zirconium

    91.2242
    ->Zirconium (40)]]
  • [[
    71 Lu

    Lutetium

    174.96681
    ->Lutetium (71)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    73 Ta

    Tantalum

    180.947882
    ->Tantalum (73)]]
  • [[
    104 Rf

    Rutherfordium

    267
    ->Rutherfordium (104)]]
Hafnium is a chemical element with symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals. Its existence was predicted by Dmitri Mendeleev in 1869, though it was not identified until 1923, making it the penultimate stable element to be discovered (rhenium was identified two years later). Watch a video about Hafnium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
73 Ta

Tantalum

180.947882
  • [[
    41 Nb

    Niobium

    92.906372
    ->Niobium (41)]]
  • [[
    72 Hf

    Hafnium

    178.492
    ->Hafnium (72)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    74 W

    Tungsten

    183.841
    ->Tungsten (74)]]
  • [[
    105 Db

    Dubnium

    268
    ->Dubnium (105)]]
Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantalus, an antihero from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Watch a video about Tantalum at Periodic Videos. (set: _credits to "`[Credits]`") _credits
74 W

Tungsten

183.841
  • [[
    42 Mo

    Molybdenum

    95.951
    ->Molybdenum (42)]]
  • [[
    73 Ta

    Tantalum

    180.947882
    ->Tantalum (73)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    75 Re

    Rhenium

    186.2071
    ->Rhenium (75)]]
  • [[
    106 Sg

    Seaborgium

    269
    ->Seaborgium (106)]]
Tungsten, also known as wolfram, is a chemical element with symbol W and atomic number 74. The word tungsten comes from the Swedish language tung sten, which directly translates to heavy stone. Its name in Swedish is volfram, however, in order to distinguish it from scheelite, which in Swedish is alternatively named tungsten. Watch a video about Tungsten at Periodic Videos. (set: _credits to "`[Credits]`") _credits
75 Re

Rhenium

186.2071
  • [[
    43 Tc

    Technetium

    98
    ->Technetium (43)]]
  • [[
    74 W

    Tungsten

    183.841
    ->Tungsten (74)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    76 Os

    Osmium

    190.233
    ->Osmium (76)]]
  • [[
    107 Bh

    Bohrium

    270
    ->Bohrium (107)]]
Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. Watch a video about Rhenium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
76 Os

Osmium

190.233
  • [[
    44 Ru

    Ruthenium

    101.072
    ->Ruthenium (44)]]
  • [[
    75 Re

    Rhenium

    186.2071
    ->Rhenium (75)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    77 Ir

    Iridium

    192.2173
    ->Iridium (77)]]
  • [[
    108 Hs

    Hassium

    269
    ->Hassium (108)]]
Osmium (from Greek osme (ὀσμή) meaning "smell") is a chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Watch a video about Osmium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
77 Ir

Iridium

192.2173
  • [[
    45 Rh

    Rhodium

    102.905502
    ->Rhodium (45)]]
  • [[
    76 Os

    Osmium

    190.233
    ->Osmium (76)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    78 Pt

    Platinum

    195.0849
    ->Platinum (78)]]
  • [[
    109 Mt

    Meitnerium

    278
    ->Meitnerium (109)]]
Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium) based on measured density, although calculations involving the space lattices of the elements show that iridium is denser. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Although only certain molten salts and halogens are corrosive to solid iridium, finely divided iridium dust is much more reactive and can be flammable. Watch a video about Iridium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
78 Pt

Platinum

195.0849
  • [[
    46 Pd

    Palladium

    106.421
    ->Palladium (46)]]
  • [[
    77 Ir

    Iridium

    192.2173
    ->Iridium (77)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    79 Au

    Gold

    196.9665695
    ->Gold (79)]]
  • [[
    110 Ds

    Darmstadtium

    281
    ->Darmstadtium (110)]]
Platinum is a chemical element with symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, gray-white transition metal. Its name is derived from the Spanish term platina, which is literally translated into "little silver". Watch a video about Platinum at Periodic Videos. (set: _credits to "`[Credits]`") _credits
79 Au

Gold

196.9665695
  • [[
    47 Ag

    Silver

    107.86822
    ->Silver (47)]]
  • [[
    78 Pt

    Platinum

    195.0849
    ->Platinum (78)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    80 Hg

    Mercury

    200.5923
    ->Mercury (80)]]
  • [[
    111 Rg

    Roentgenium

    282
    ->Roentgenium (111)]]
Gold is a chemical element with symbol Au ( from Latin : aurum) and atomic number 79. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable and ductile metal. Chemically, gold is a transition metal and a group 11 element. Watch a video about Gold at Periodic Videos. (set: _credits to "`[Credits]`") _credits
80 Hg

Mercury

200.5923
  • [[
    48 Cd

    Cadmium

    112.4144
    ->Cadmium (48)]]
  • [[
    79 Au

    Gold

    196.9665695
    ->Gold (79)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    81 Tl

    Thallium

    204.38
    ->Thallium (81)]]
  • [[
    112 Cn

    Copernicium

    285
    ->Copernicium (112)]]
Mercury is a chemical element with symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum (/haɪˈdrɑːrdʒərəm/). A heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine, though metals such as caesium, gallium, and rubidium melt just above room temperature. Watch a video about Mercury at Periodic Videos. (set: _credits to "`[Credits]`") _credits
81 Tl

Thallium

204.38
  • [[
    49 In

    Indium

    114.8181
    ->Indium (49)]]
  • [[
    80 Hg

    Mercury

    200.5923
    ->Mercury (80)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    82 Pb

    Lead

    207.21
    ->Lead (82)]]
  • [[
    113 Nh

    Nihonium

    286
    ->Nihonium (113)]]
Thallium is a chemical element with symbol Tl and atomic number 81. This soft gray post-transition metal is not found free in nature. When isolated, it resembles tin, but discolors when exposed to air. Watch a video about Thallium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
82 Pb

Lead

207.21
  • [[
    50 Sn

    Tin

    118.7107
    ->Tin (50)]]
  • [[
    81 Tl

    Thallium

    204.38
    ->Thallium (81)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    83 Bi

    Bismuth

    208.980401
    ->Bismuth (83)]]
  • [[
    114 Fl

    Flerovium

    289
    ->Flerovium (114)]]
Lead ( /lɛd/) is a chemical element in the carbon group with symbol Pb (from Latin : plumbum) and atomic number 82. Lead is a soft, malleable and heavy post-transition metal. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed to air. Watch a video about Lead at Periodic Videos. (set: _credits to "`[Credits]`") _credits
83 Bi

Bismuth

208.980401
  • [[
    51 Sb

    Antimony

    121.7601
    ->Antimony (51)]]
  • [[
    82 Pb

    Lead

    207.21
    ->Lead (82)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    84 Po

    Polonium

    209
    ->Polonium (84)]]
  • [[
    115 Mc

    Moscovium

    289
    ->Moscovium (115)]]
Bismuth is a chemical element with symbol Bi and atomic number 83. Bismuth, a pentavalent post-transition metal, chemically resembles arsenic and antimony. Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores. Watch a video about Bismuth at Periodic Videos. (set: _credits to "`[Credits]`") _credits
84 Po

Polonium

209
  • [[
    52 Te

    Tellurium

    127.603
    ->Tellurium (52)]]
  • [[
    83 Bi

    Bismuth

    208.980401
    ->Bismuth (83)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    85 At

    Astatine

    210
    ->Astatine (85)]]
  • [[
    116 Lv

    Livermorium

    293
    ->Livermorium (116)]]
Polonium is a chemical element with symbol Po and atomic number 84, discovered in 1898 by Marie Curie and Pierre Curie. A rare and highly radioactive element with no stable isotopes, polonium is chemically similar to bismuth and tellurium, and it occurs in uranium ores. Applications of polonium are few. Watch a video about Polonium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
85 At

Astatine

210
  • [[
    53 I

    Iodine

    126.904473
    ->Iodine (53)]]
  • [[
    84 Po

    Polonium

    209
    ->Polonium (84)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    86 Rn

    Radon

    222
    ->Radon (86)]]
  • [[
    117 Ts

    Tennessine

    294
    ->Tennessine (117)]]
Astatine is a very rare radioactive chemical element with the chemical symbol At and atomic number 85. It occurs on Earth as the decay product of various heavier elements. All its isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours. Watch a video about Astatine at Periodic Videos. (set: _credits to "`[Credits]`") _credits
86 Rn

Radon

222
  • [[
    54 Xe

    Xenon

    131.2936
    ->Xenon (54)]]
  • [[
    85 At

    Astatine

    210
    ->Astatine (85)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    55 Cs

    Cesium

    132.905451966
    ->Cesium (55)]]
  • [[
    118 Og

    Oganesson

    294
    ->Oganesson (118)]]
Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas, occurring naturally as a decay product of radium. Its most stable isotope, 222Rn, has a half-life of 3.8 days. Watch a video about Radon at Periodic Videos. (set: _credits to "`[Credits]`") _credits
87 Fr

Francium

223
  • [[
    55 Cs

    Cesium

    132.905451966
    ->Cesium (55)]]
  • [[
    118 Og

    Oganesson

    294
    ->Oganesson (118)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    88 Ra

    Radium

    226
    ->Radium (88)]]
  • [[
    1 H

    Hydrogen

    1.008
    ->Hydrogen (1)]]
Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium and actinium K. It is the second-least electronegative element, behind only caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Watch a video about Francium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
88 Ra

Radium

226
  • [[
    56 Ba

    Barium

    137.3277
    ->Barium (56)]]
  • [[
    87 Fr

    Francium

    223
    ->Francium (87)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    89 Ac

    Actinium

    227
    ->Actinium (89)]]
  • [[
    4 Be

    Beryllium

    9.01218315
    ->Beryllium (4)]]
Radium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is almost colorless, but it readily combines with nitrogen (rather than oxygen) on exposure to air, forming a black surface layer of radium nitride (Ra3N2). Watch a video about Radium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
89 Ac

Actinium

227
  • [[
    57 La

    Lanthanum

    138.905477
    ->Lanthanum (57)]]
  • [[
    88 Ra

    Radium

    226
    ->Radium (88)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    90 Th

    Thorium

    232.03774
    ->Thorium (90)]]
  • [[
    57 La

    Lanthanum

    138.905477
    ->Lanthanum (57)]]
Actinium is a radioactive chemical element with symbol Ac (not to be confused with the abbreviation for an acetyl group) and atomic number 89, which was discovered in 1899. It was the first non-primordial radioactive element to be isolated. Polonium, radium and radon were observed before actinium, but they were not isolated until 1902. Watch a video about Actinium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
90 Th

Thorium

232.03774
  • [[
    58 Ce

    Cerium

    140.1161
    ->Cerium (58)]]
  • [[
    89 Ac

    Actinium

    227
    ->Actinium (89)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    91 Pa

    Protactinium

    231.035882
    ->Protactinium (91)]]
  • [[
    58 Ce

    Cerium

    140.1161
    ->Cerium (58)]]
Thorium is a chemical element with symbol Th and atomic number 90. A radioactive actinide metal, thorium is one of only two significantly radioactive elements that still occur naturally in large quantities as a primordial element (the other being uranium). It was discovered in 1828 by the Norwegian Reverend and amateur mineralogist Morten Thrane Esmark and identified by the Swedish chemist Jöns Jakob Berzelius, who named it after Thor, the Norse god of thunder. Watch a video about Thorium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
91 Pa

Protactinium

231.035882
  • [[
    59 Pr

    Praseodymium

    140.907662
    ->Praseodymium (59)]]
  • [[
    90 Th

    Thorium

    232.03774
    ->Thorium (90)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    92 U

    Uranium

    238.028913
    ->Uranium (92)]]
  • [[
    59 Pr

    Praseodymium

    140.907662
    ->Praseodymium (59)]]
Protactinium is a chemical element with symbol Pa and atomic number 91. It is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds where protactinium is usually present in the oxidation state +5, but can also assume +4 and even +2 or +3 states. Watch a video about Protactinium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
92 U

Uranium

238.028913
  • [[
    60 Nd

    Neodymium

    144.2423
    ->Neodymium (60)]]
  • [[
    91 Pa

    Protactinium

    231.035882
    ->Protactinium (91)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    93 Np

    Neptunium

    237
    ->Neptunium (93)]]
  • [[
    60 Nd

    Neodymium

    144.2423
    ->Neodymium (60)]]
Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-white metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Watch a video about Uranium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
93 Np

Neptunium

237
  • [[
    61 Pm

    Promethium

    145
    ->Promethium (61)]]
  • [[
    92 U

    Uranium

    238.028913
    ->Uranium (92)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    94 Pu

    Plutonium

    244
    ->Plutonium (94)]]
  • [[
    61 Pm

    Promethium

    145
    ->Promethium (61)]]
Neptunium is a chemical element with symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. Its position in the periodic table just after uranium, named after the planet Uranus, led to it being named after Neptune, the next planet beyond Uranus. Watch a video about Neptunium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
94 Pu

Plutonium

244
  • [[
    62 Sm

    Samarium

    150.362
    ->Samarium (62)]]
  • [[
    93 Np

    Neptunium

    237
    ->Neptunium (93)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    95 Am

    Americium

    243
    ->Americium (95)]]
  • [[
    62 Sm

    Samarium

    150.362
    ->Samarium (62)]]
Plutonium is a transuranic radioactive chemical element with symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. Watch a video about Plutonium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
95 Am

Americium

243
  • [[
    63 Eu

    Europium

    151.9641
    ->Europium (63)]]
  • [[
    94 Pu

    Plutonium

    244
    ->Plutonium (94)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    96 Cm

    Curium

    247
    ->Curium (96)]]
  • [[
    63 Eu

    Europium

    151.9641
    ->Europium (63)]]
Americium is a radioactive transuranic chemical element with symbol Am and atomic number 95. This member of the actinide series is located in the periodic table under the lanthanide element europium, and thus by analogy was named after the Americas. Americium was first produced in 1944 by the group of Glenn T.Seaborg from Berkeley, California, at the metallurgical laboratory of University of Chicago. Watch a video about Americium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
96 Cm

Curium

247
  • [[
    64 Gd

    Gadolinium

    157.253
    ->Gadolinium (64)]]
  • [[
    95 Am

    Americium

    243
    ->Americium (95)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    97 Bk

    Berkelium

    247
    ->Berkelium (97)]]
  • [[
    64 Gd

    Gadolinium

    157.253
    ->Gadolinium (64)]]
Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96. This element of the actinide series was named after Marie and Pierre Curie – both were known for their research on radioactivity. Curium was first intentionally produced and identified in July 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley. Watch a video about Curium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
97 Bk

Berkelium

247
  • [[
    65 Tb

    Terbium

    158.925352
    ->Terbium (65)]]
  • [[
    96 Cm

    Curium

    247
    ->Curium (96)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    98 Cf

    Californium

    251
    ->Californium (98)]]
  • [[
    65 Tb

    Terbium

    158.925352
    ->Terbium (65)]]
Berkelium is a transuranic radioactive chemical element with symbol Bk and atomic number 97. It is a member of the actinide and transuranium element series. It is named after the city of Berkeley, California, the location of the University of California Radiation Laboratory where it was discovered in December 1949. Watch a video about Berkelium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
98 Cf

Californium

251
  • [[
    66 Dy

    Dysprosium

    162.5001
    ->Dysprosium (66)]]
  • [[
    97 Bk

    Berkelium

    247
    ->Berkelium (97)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    99 Es

    Einsteinium

    252
    ->Einsteinium (99)]]
  • [[
    66 Dy

    Dysprosium

    162.5001
    ->Dysprosium (66)]]
Californium is a radioactive metallic chemical element with symbol Cf and atomic number 98. The element was first made in 1950 at the University of California Radiation Laboratory in Berkeley, by bombarding curium with alpha particles (helium-4 ions). It is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). Watch a video about Californium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
99 Es

Einsteinium

252
  • [[
    67 Ho

    Holmium

    164.930332
    ->Holmium (67)]]
  • [[
    98 Cf

    Californium

    251
    ->Californium (98)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    100 Fm

    Fermium

    257
    ->Fermium (100)]]
  • [[
    67 Ho

    Holmium

    164.930332
    ->Holmium (67)]]
Einsteinium is a synthetic element with symbol Es and atomic number 99. It is the seventh transuranic element, and an actinide. Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952, and named after Albert Einstein. Watch a video about Einsteinium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
100 Fm

Fermium

257
  • [[
    68 Er

    Erbium

    167.2593
    ->Erbium (68)]]
  • [[
    99 Es

    Einsteinium

    252
    ->Einsteinium (99)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    101 Md

    Mendelevium

    258
    ->Mendelevium (101)]]
  • [[
    68 Er

    Erbium

    167.2593
    ->Erbium (68)]]
Fermium is a synthetic element with symbol Fm and atomic number 100. It is a member of the actinide series. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities, although pure fermium metal has not yet been prepared. Watch a video about Fermium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
101 Md

Mendelevium

258
  • [[
    69 Tm

    Thulium

    168.934222
    ->Thulium (69)]]
  • [[
    100 Fm

    Fermium

    257
    ->Fermium (100)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    102 No

    Nobelium

    259
    ->Nobelium (102)]]
  • [[
    69 Tm

    Thulium

    168.934222
    ->Thulium (69)]]
Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the antepenultimate actinide and the ninth transuranic element. Watch a video about Mendelevium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
102 No

Nobelium

259
  • [[
    70 Yb

    Ytterbium

    173.0451
    ->Ytterbium (70)]]
  • [[
    101 Md

    Mendelevium

    258
    ->Mendelevium (101)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    103 Lr

    Lawrencium

    266
    ->Lawrencium (103)]]
  • [[
    70 Yb

    Ytterbium

    173.0451
    ->Ytterbium (70)]]
Nobelium is a synthetic chemical element with symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science. A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series. Watch a video about Nobelium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
103 Lr

Lawrencium

266
  • [[
    71 Lu

    Lutetium

    174.96681
    ->Lutetium (71)]]
  • [[
    102 No

    Nobelium

    259
    ->Nobelium (102)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    104 Rf

    Rutherfordium

    267
    ->Rutherfordium (104)]]
  • [[
    21 Sc

    Scandium

    44.9559085
    ->Scandium (21)]]
Lawrencium is a synthetic chemical element with chemical symbol Lr (formerly Lw) and atomic number 103. It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements. A radioactive metal, lawrencium is the eleventh transuranic element and is also the final member of the actinide series. Watch a video about Lawrencium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
104 Rf

Rutherfordium

267
  • [[
    72 Hf

    Hafnium

    178.492
    ->Hafnium (72)]]
  • [[
    103 Lr

    Lawrencium

    266
    ->Lawrencium (103)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    105 Db

    Dubnium

    268
    ->Dubnium (105)]]
  • [[
    22 Ti

    Titanium

    47.8671
    ->Titanium (22)]]
Rutherfordium is a chemical element with symbol Rf and atomic number 104, named in honor of physicist Ernest Rutherford. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 267Rf, has a half-life of approximately 1.3 hours. In the periodic table of the elements, it is a d - block element and the second of the fourth - row transition elements. Watch a video about Rutherfordium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
105 Db

Dubnium

268
  • [[
    73 Ta

    Tantalum

    180.947882
    ->Tantalum (73)]]
  • [[
    104 Rf

    Rutherfordium

    267
    ->Rutherfordium (104)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    106 Sg

    Seaborgium

    269
    ->Seaborgium (106)]]
  • [[
    23 V

    Vanadium

    50.94151
    ->Vanadium (23)]]
Dubnium is a chemical element with symbol Db and atomic number 105. It is named after the town of Dubna in Russia (north of Moscow), where it was first produced. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, dubnium-268, has a half-life of approximately 28 hours. Watch a video about Dubnium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
106 Sg

Seaborgium

269
  • [[
    74 W

    Tungsten

    183.841
    ->Tungsten (74)]]
  • [[
    105 Db

    Dubnium

    268
    ->Dubnium (105)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    107 Bh

    Bohrium

    270
    ->Bohrium (107)]]
  • [[
    24 Cr

    Chromium

    51.99616
    ->Chromium (24)]]
Seaborgium is a synthetic element with symbol Sg and atomic number 106. Its most stable isotope 271Sg has a half-life of 1.9 minutes. A more recently discovered isotope 269Sg has a potentially slightly longer half-life (ca. Watch a video about Seaborgium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
107 Bh

Bohrium

270
  • [[
    75 Re

    Rhenium

    186.2071
    ->Rhenium (75)]]
  • [[
    106 Sg

    Seaborgium

    269
    ->Seaborgium (106)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    108 Hs

    Hassium

    269
    ->Hassium (108)]]
  • [[
    25 Mn

    Manganese

    54.9380443
    ->Manganese (25)]]
Bohrium is a chemical element with symbol Bh and atomic number 107. It is named after Danish physicist Niels Bohr. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 270Bh, has a half-life of approximately 61 seconds. Watch a video about Bohrium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
108 Hs

Hassium

269
  • [[
    76 Os

    Osmium

    190.233
    ->Osmium (76)]]
  • [[
    107 Bh

    Bohrium

    270
    ->Bohrium (107)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    109 Mt

    Meitnerium

    278
    ->Meitnerium (109)]]
  • [[
    26 Fe

    Iron

    55.8452
    ->Iron (26)]]
Hassium is a chemical element with symbol Hs and atomic number 108, named after the German state of Hesse. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds, although an unconfirmed metastable state, 277mHs, may have a longer half-life of about 130 seconds. More than 100 atoms of hassium have been synthesized to date. Watch a video about Hassium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
109 Mt

Meitnerium

278
  • [[
    77 Ir

    Iridium

    192.2173
    ->Iridium (77)]]
  • [[
    108 Hs

    Hassium

    269
    ->Hassium (108)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    110 Ds

    Darmstadtium

    281
    ->Darmstadtium (110)]]
  • [[
    27 Co

    Cobalt

    58.9331944
    ->Cobalt (27)]]
Meitnerium is a chemical element with symbol Mt and atomic number 109. It is an extremely radioactive synthetic element (an element not found in nature that can be created in a laboratory). The most stable known isotope, meitnerium-278, has a half-life of 7.6 seconds. Watch a video about Meitnerium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
110 Ds

Darmstadtium

281
  • [[
    78 Pt

    Platinum

    195.0849
    ->Platinum (78)]]
  • [[
    109 Mt

    Meitnerium

    278
    ->Meitnerium (109)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    111 Rg

    Roentgenium

    282
    ->Roentgenium (111)]]
  • [[
    28 Ni

    Nickel

    58.69344
    ->Nickel (28)]]
Darmstadtium is a chemical element with symbol Ds and atomic number 110. It is an extremely radioactive synthetic element. The most stable known isotope, darmstadtium-281, has a half-life of approximately 10 seconds. Watch a video about Darmstadtium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
111 Rg

Roentgenium

282
  • [[
    79 Au

    Gold

    196.9665695
    ->Gold (79)]]
  • [[
    110 Ds

    Darmstadtium

    281
    ->Darmstadtium (110)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    112 Cn

    Copernicium

    285
    ->Copernicium (112)]]
  • [[
    29 Cu

    Copper

    63.5463
    ->Copper (29)]]
Roentgenium is a chemical element with symbol Rg and atomic number 111. It is an extremely radioactive synthetic element (an element that can be created in a laboratory but is not found in nature); the most stable known isotope, roentgenium-282, has a half-life of 2.1 minutes. Roentgenium was first created in 1994 by the GSI Helmholtz Centre for Heavy Ion Research near Darmstadt, Germany. Watch a video about Roentgenium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
112 Cn

Copernicium

285
  • [[
    80 Hg

    Mercury

    200.5923
    ->Mercury (80)]]
  • [[
    111 Rg

    Roentgenium

    282
    ->Roentgenium (111)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    113 Nh

    Nihonium

    286
    ->Nihonium (113)]]
  • [[
    30 Zn

    Zinc

    65.382
    ->Zinc (30)]]
Copernicium is a chemical element with symbol Cn and atomic number 112. It is an extremely radioactive synthetic element that can only be created in a laboratory. The most stable known isotope, copernicium-285, has a half-life of approximately 29 seconds, but it is possible that this copernicium isotope may have a nuclear isomer with a longer half-life, 8.9 min. Watch a video about Copernicium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
113 Nh

Nihonium

286
  • [[
    81 Tl

    Thallium

    204.38
    ->Thallium (81)]]
  • [[
    112 Cn

    Copernicium

    285
    ->Copernicium (112)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    114 Fl

    Flerovium

    289
    ->Flerovium (114)]]
  • [[
    5 B

    Boron

    10.81
    ->Boron (5)]]
Nihonium is a chemical element with atomic number 113. It has a symbol Nh. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and is extremely radioactive; its most stable known isotope, nihonium-286, has a half-life of 20 seconds. Watch a video about Nihonium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
114 Fl

Flerovium

289
  • [[
    82 Pb

    Lead

    207.21
    ->Lead (82)]]
  • [[
    113 Nh

    Nihonium

    286
    ->Nihonium (113)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    115 Mc

    Moscovium

    289
    ->Moscovium (115)]]
  • [[
    6 C

    Carbon

    12.011
    ->Carbon (6)]]
Flerovium is a superheavy artificial chemical element with symbol Fl and atomic number 114. It is an extremely radioactive synthetic element. The element is named after the Flerov Laboratory of Nuclear Reactions of the Joint Institute for Nuclear Research in Dubna, Russia, where the element was discovered in 1998. Watch a video about Flerovium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
115 Mc

Moscovium

289
  • [[
    83 Bi

    Bismuth

    208.980401
    ->Bismuth (83)]]
  • [[
    114 Fl

    Flerovium

    289
    ->Flerovium (114)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    116 Lv

    Livermorium

    293
    ->Livermorium (116)]]
  • [[
    7 N

    Nitrogen

    14.007
    ->Nitrogen (7)]]
Moscovium is the name of a synthetic superheavy element in the periodic table that has the symbol Mc and has the atomic number 115. It is an extremely radioactive element; its most stable known isotope, moscovium-289, has a half-life of only 220 milliseconds. It is also known as eka-bismuth or simply element 115. Watch a video about Moscovium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
116 Lv

Livermorium

293
  • [[
    84 Po

    Polonium

    209
    ->Polonium (84)]]
  • [[
    115 Mc

    Moscovium

    289
    ->Moscovium (115)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    117 Ts

    Tennessine

    294
    ->Tennessine (117)]]
  • [[
    8 O

    Oxygen

    15.999
    ->Oxygen (8)]]
Livermorium is a synthetic superheavy element with symbol Lv and atomic number 116. It is an extremely radioactive element that has only been created in the laboratory and has not been observed in nature. The element is named after the Lawrence Livermore National Laboratory in the United States, which collaborated with the Joint Institute for Nuclear Research in Dubna, Russia to discover livermorium in 2000. Watch a video about Livermorium at Periodic Videos. (set: _credits to "`[Credits]`") _credits
117 Ts

Tennessine

294
  • [[
    85 At

    Astatine

    210
    ->Astatine (85)]]
  • [[
    116 Lv

    Livermorium

    293
    ->Livermorium (116)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    118 Og

    Oganesson

    294
    ->Oganesson (118)]]
  • [[
    9 F

    Fluorine

    18.9984031636
    ->Fluorine (9)]]
Tennessine is a superheavy artificial chemical element with an atomic number of 117 and a symbol of Ts. Also known as eka-astatine or element 117, it is the second-heaviest known element and penultimate element of the 7th period of the periodic table. As of 2016, fifteen tennessine atoms have been observed:six when it was first synthesized in 2010, seven in 2012, and two in 2014. Watch a video about Tennessine at Periodic Videos. (set: _credits to "`[Credits]`") _credits
118 Og

Oganesson

294
  • [[
    86 Rn

    Radon

    222
    ->Radon (86)]]
  • [[
    117 Ts

    Tennessine

    294
    ->Tennessine (117)]]
  • [[
    Table
    ->The Periodic Table]]
  • [[
    87 Fr

    Francium

    223
    ->Francium (87)]]
  • [[
    2 He

    Helium

    4.0026022
    ->Helium (2)]]
Oganesson is IUPAC's name for the transactinide element with the atomic number 118 and element symbol Og. It is also known as eka-radon or element 118, and on the periodic table of the elements it is a p-block element and the last one of the 7th period. Oganesson is currently the only synthetic member of group 18. Watch a video about Oganesson at Periodic Videos. (set: _credits to "`[Credits]`") _credits