IUPAC 2021 · CODATA Reference Atlas

All 118 Chemical Elements

Complete reference directory of every confirmed element from Hydrogen (Z = 1) through Oganesson (Z = 118). Filter by chemical family, STP phase, or search by atomic number, symbol, and electron configuration.

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Showing 118 of 118 confirmed IUPAC elements

1H1.008

Hydrogen

P1 · G1

Reactive nonmetal

1s¹

2He4.0026

Helium

P1 · G18

Noble gas

1s²

3Li6.94

Lithium

P2 · G1

Alkali metal

[He] 2s¹

4Be9.0122

Beryllium

P2 · G2

Alkaline earth metal

[He] 2s²

5B10.81

Boron

P2 · G13

Metalloid

[He] 2s² 2p¹

6C12.011

Carbon

P2 · G14

Reactive nonmetal

[He] 2s² 2p²

7N14.007

Nitrogen

P2 · G15

Reactive nonmetal

[He] 2s² 2p³

8O15.999

Oxygen

P2 · G16

Reactive nonmetal

[He] 2s² 2p⁴

9F18.998

Fluorine

P2 · G17

Halogen

[He] 2s² 2p⁵

10Ne20.180

Neon

P2 · G18

Noble gas

[He] 2s² 2p⁶

11Na22.990

Sodium

P3 · G1

Alkali metal

[Ne] 3s¹

12Mg24.305

Magnesium

P3 · G2

Alkaline earth metal

[Ne] 3s²

13Al26.982

Aluminium

P3 · G13

Post-transition metal

[Ne] 3s² 3p¹

14Si28.085

Silicon

P3 · G14

Metalloid

[Ne] 3s² 3p²

15P30.974

Phosphorus

P3 · G15

Reactive nonmetal

[Ne] 3s² 3p³

16S32.06

Sulfur

P3 · G16

Reactive nonmetal

[Ne] 3s² 3p⁴

17Cl35.45

Chlorine

P3 · G17

Halogen

[Ne] 3s² 3p⁵

18Ar39.948

Argon

P3 · G18

Noble gas

[Ne] 3s² 3p⁶

19K39.098

Potassium

P4 · G1

Alkali metal

[Ar] 4s¹

20Ca40.078

Calcium

P4 · G2

Alkaline earth metal

[Ar] 4s²

21Sc44.956

Scandium

P4 · G3

Transition metal

[Ar] 3d¹ 4s²

22Ti47.867

Titanium

P4 · G4

Transition metal

[Ar] 3d² 4s²

23V50.942

Vanadium

P4 · G5

Transition metal

[Ar] 3d³ 4s²

24Cr51.996

Chromium

P4 · G6

Transition metal

[Ar] 3d⁵ 4s¹

25Mn54.938

Manganese

P4 · G7

Transition metal

[Ar] 3d⁵ 4s²

26Fe55.845

Iron

P4 · G8

Transition metal

[Ar] 3d⁶ 4s²

27Co58.933

Cobalt

P4 · G9

Transition metal

[Ar] 3d⁷ 4s²

28Ni58.693

Nickel

P4 · G10

Transition metal

[Ar] 3d⁸ 4s²

29Cu63.546

Copper

P4 · G11

Transition metal

[Ar] 3d¹⁰ 4s¹

30Zn65.38

Zinc

P4 · G12

Transition metal

[Ar] 3d¹⁰ 4s²

31Ga69.723

Gallium

P4 · G13

Post-transition metal

[Ar] 3d¹⁰ 4s² 4p¹

32Ge72.630

Germanium

P4 · G14

Metalloid

[Ar] 3d¹⁰ 4s² 4p²

33As74.922

Arsenic

P4 · G15

Metalloid

[Ar] 3d¹⁰ 4s² 4p³

34Se78.971

Selenium

P4 · G16

Reactive nonmetal

[Ar] 3d¹⁰ 4s² 4p⁴

35Br79.904

Bromine

P4 · G17

Halogen

[Ar] 3d¹⁰ 4s² 4p⁵

36Kr83.798

Krypton

P4 · G18

Noble gas

[Ar] 3d¹⁰ 4s² 4p⁶

37Rb85.468

Rubidium

P5 · G1

Alkali metal

[Kr] 5s¹

38Sr87.62

Strontium

P5 · G2

Alkaline earth metal

[Kr] 5s²

39Y88.906

Yttrium

P5 · G3

Transition metal

[Kr] 4d¹ 5s²

40Zr91.224

Zirconium

P5 · G4

Transition metal

[Kr] 4d² 5s²

41Nb92.906

Niobium

P5 · G5

Transition metal

[Kr] 4d⁴ 5s¹

42Mo95.95

Molybdenum

P5 · G6

Transition metal

[Kr] 4d⁵ 5s¹

43Tc[98]

Technetium

P5 · G7

Transition metal

[Kr] 4d⁵ 5s²

44Ru101.07

Ruthenium

P5 · G8

Transition metal

[Kr] 4d⁷ 5s¹

45Rh102.91

Rhodium

P5 · G9

Transition metal

[Kr] 4d⁸ 5s¹

46Pd106.42

Palladium

P5 · G10

Transition metal

[Kr] 4d¹⁰

47Ag107.87

Silver

P5 · G11

Transition metal

[Kr] 4d¹⁰ 5s¹

48Cd112.41

Cadmium

P5 · G12

Transition metal

[Kr] 4d¹⁰ 5s²

49In114.82

Indium

P5 · G13

Post-transition metal

[Kr] 4d¹⁰ 5s² 5p¹

50Sn118.71

Tin

P5 · G14

Post-transition metal

[Kr] 4d¹⁰ 5s² 5p²

51Sb121.76

Antimony

P5 · G15

Metalloid

[Kr] 4d¹⁰ 5s² 5p³

52Te127.60

Tellurium

P5 · G16

Metalloid

[Kr] 4d¹⁰ 5s² 5p⁴

53I126.90

Iodine

P5 · G17

Halogen

[Kr] 4d¹⁰ 5s² 5p⁵

54Xe131.29

Xenon

P5 · G18

Noble gas

[Kr] 4d¹⁰ 5s² 5p⁶

55Cs132.91

Caesium

P6 · G1

Alkali metal

[Xe] 6s¹

56Ba137.33

Barium

P6 · G2

Alkaline earth metal

[Xe] 6s²

57La138.91

Lanthanum

P6 · f-block

Lanthanide

[Xe] 5d¹ 6s²

58Ce140.12

Cerium

P6 · f-block

Lanthanide

[Xe] 4f¹ 5d¹ 6s²

59Pr140.91

Praseodymium

P6 · f-block

Lanthanide

[Xe] 4f³ 6s²

60Nd144.24

Neodymium

P6 · f-block

Lanthanide

[Xe] 4f⁴ 6s²

61Pm[145]

Promethium

P6 · f-block

Lanthanide

[Xe] 4f⁵ 6s²

62Sm150.36

Samarium

P6 · f-block

Lanthanide

[Xe] 4f⁶ 6s²

63Eu151.96

Europium

P6 · f-block

Lanthanide

[Xe] 4f⁷ 6s²

64Gd157.25

Gadolinium

P6 · f-block

Lanthanide

[Xe] 4f⁷ 5d¹ 6s²

65Tb158.93

Terbium

P6 · f-block

Lanthanide

[Xe] 4f⁹ 6s²

66Dy162.50

Dysprosium

P6 · f-block

Lanthanide

[Xe] 4f¹⁰ 6s²

67Ho164.93

Holmium

P6 · f-block

Lanthanide

[Xe] 4f¹¹ 6s²

68Er167.26

Erbium

P6 · f-block

Lanthanide

[Xe] 4f¹² 6s²

69Tm168.93

Thulium

P6 · f-block

Lanthanide

[Xe] 4f¹³ 6s²

70Yb173.05

Ytterbium

P6 · f-block

Lanthanide

[Xe] 4f¹⁴ 6s²

71Lu174.97

Lutetium

P6 · f-block

Lanthanide

[Xe] 4f¹⁴ 5d¹ 6s²

72Hf178.49

Hafnium

P6 · G4

Transition metal

[Xe] 4f¹⁴ 5d² 6s²

73Ta180.95

Tantalum

P6 · G5

Transition metal

[Xe] 4f¹⁴ 5d³ 6s²

74W183.84

Tungsten

P6 · G6

Transition metal

[Xe] 4f¹⁴ 5d⁴ 6s²

75Re186.21

Rhenium

P6 · G7

Transition metal

[Xe] 4f¹⁴ 5d⁵ 6s²

76Os190.23

Osmium

P6 · G8

Transition metal

[Xe] 4f¹⁴ 5d⁶ 6s²

77Ir192.22

Iridium

P6 · G9

Transition metal

[Xe] 4f¹⁴ 5d⁷ 6s²

78Pt195.08

Platinum

P6 · G10

Transition metal

[Xe] 4f¹⁴ 5d⁹ 6s¹

79Au196.97

Gold

P6 · G11

Transition metal

[Xe] 4f¹⁴ 5d¹⁰ 6s¹

80Hg200.59

Mercury

P6 · G12

Transition metal

[Xe] 4f¹⁴ 5d¹⁰ 6s²

81Tl204.38

Thallium

P6 · G13

Post-transition metal

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹

82Pb207.2

Lead

P6 · G14

Post-transition metal

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²

83Bi208.98

Bismuth

P6 · G15

Post-transition metal

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³

84Po[209]

Polonium

P6 · G16

Post-transition metal

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴

85At[210]

Astatine

P6 · G17

Halogen

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵

86Rn[222]

Radon

P6 · G18

Noble gas

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶

87Fr[223]

Francium

P7 · G1

Alkali metal

[Rn] 7s¹

88Ra[226]

Radium

P7 · G2

Alkaline earth metal

[Rn] 7s²

89Ac[227]

Actinium

P7 · f-block

Actinide

[Rn] 6d¹ 7s²

90Th232.04

Thorium

P7 · f-block

Actinide

[Rn] 6d² 7s²

91Pa231.04

Protactinium

P7 · f-block

Actinide

[Rn] 5f² 6d¹ 7s²

92U238.03

Uranium

P7 · f-block

Actinide

[Rn] 5f³ 6d¹ 7s²

93Np[237]

Neptunium

P7 · f-block

Actinide

[Rn] 5f⁴ 6d¹ 7s²

94Pu[244]

Plutonium

P7 · f-block

Actinide

[Rn] 5f⁶ 7s²

95Am[243]

Americium

P7 · f-block

Actinide

[Rn] 5f⁷ 7s²

96Cm[247]

Curium

P7 · f-block

Actinide

[Rn] 5f⁷ 6d¹ 7s²

97Bk[247]

Berkelium

P7 · f-block

Actinide

[Rn] 5f⁹ 7s²

98Cf[251]

Californium

P7 · f-block

Actinide

[Rn] 5f¹⁰ 7s²

99Es[252]

Einsteinium

P7 · f-block

Actinide

[Rn] 5f¹¹ 7s²

100Fm[257]

Fermium

P7 · f-block

Actinide

[Rn] 5f¹² 7s²

101Md[258]

Mendelevium

P7 · f-block

Actinide

[Rn] 5f¹³ 7s²

102No[259]

Nobelium

P7 · f-block

Actinide

[Rn] 5f¹⁴ 7s²

103Lr[266]

Lawrencium

P7 · f-block

Actinide

[Rn] 5f¹⁴ 7s² 7p¹

104Rf[267]

Rutherfordium

P7 · G4

Transition metal

[Rn] 5f¹⁴ 6d² 7s²

105Db[268]

Dubnium

P7 · G5

Transition metal

[Rn] 5f¹⁴ 6d³ 7s²

106Sg[269]

Seaborgium

P7 · G6

Transition metal

[Rn] 5f¹⁴ 6d⁴ 7s²

107Bh[270]

Bohrium

P7 · G7

Transition metal

[Rn] 5f¹⁴ 6d⁵ 7s²

108Hs[277]

Hassium

P7 · G8

Transition metal

[Rn] 5f¹⁴ 6d⁶ 7s²

109Mt[278]

Meitnerium

P7 · G9

Unknown properties

[Rn] 5f¹⁴ 6d⁷ 7s²

110Ds[281]

Darmstadtium

P7 · G10

Unknown properties

[Rn] 5f¹⁴ 6d⁸ 7s²

111Rg[282]

Roentgenium

P7 · G11

Unknown properties

[Rn] 5f¹⁴ 6d⁹ 7s²

112Cn[285]

Copernicium

P7 · G12

Transition metal

[Rn] 5f¹⁴ 6d¹⁰ 7s²

113Nh[286]

Nihonium

P7 · G13

Unknown properties

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹

114Fl[289]

Flerovium

P7 · G14

Unknown properties

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²

115Mc[290]

Moscovium

P7 · G15

Unknown properties

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³

116Lv[293]

Livermorium

P7 · G16

Unknown properties

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴

117Ts[294]

Tennessine

P7 · G17

Unknown properties

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵

118Og[294]

Oganesson

P7 · G18

Unknown properties

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶