1

Hhydrogen

[1.007, 1.009]

1 18

3

Lilithium

[6.938, 6.997]

4

Beberyllium

9.012

11

Nasodium

22.99

12

Mgmagnesium[24.30, 24.31]

19

Kpotassium

39.10

20

Cacalcium

40.08

37

Rbrubidium

85.47

38

Srstrontium

87.62

38

Srstrontium

87.62

55

Cscaesium

132.9

55

Cscaesium

132.9

56

Babarium

137.3

87

Frfrancium

88

Raradium

5

Bboron

[10.80, 10.83]

13

Alaluminium

26.98

31

Gagallium

69.72

49

Inindium114.8

81

Tlthallium

[204.3, 204.4]

6

Ccarbon

[12.00, 12.02]

14

Sisilicon

[28.08, 28.09]

32

Gegermanium

72.63

50

Sntin

118.7

82

Pblead207.2

7

Nnitrogen

[14.00, 14.01]

15

Pphosphorus

30.97

33

Asarsenic

74.92

51

Sbantimony

121.8

83

Bibismuth

209.0

8

Ooxygen

[15.99, 16.00]

16

Ssulfur

[32.05, 32.08]

34

Seselenium

78.97

52

Tetellurium

127.6

84

Popolonium

9

Ffluorine

19.00

17

Clchlorine

[35.44, 35.46]

35

Brbromine

[79.90, 79.91]

53

Iiodine126.9

85

Atastatine

10

Neneon20.18

2

Hehelium4.003

18

Arargon39.95

36

Krkrypton

83.80

54

Xexenon131.3

86

Rnradon

22

Tititanium

47.87

22

Tititanium

47.87

40

Zrzirconium

91.22

72

Hfhafnium

178.5

104

Rfrutherfordium

23

Vvanadium

50.94

41

Nbniobium

92.91

73

Tatantalum

180.9

105

Dbdubnium

24

Crchromium

52.00

24

Crchromium

52.00

42

Momolybdenum

95.95

74

Wtungsten

183.8

106

Sgseaborgium

25

Mnmanganese

54.94

43

Tctechnetium

75

Rerhenium

186.2

107

Bhbohrium

26

Feiron55.85

44

Ruruthenium

101.1

76

Ososmium

190.2

108

Hshassium

27

Cocobalt58.93

45

Rhrhodium

102.9

77

Iriridium192.2

109

Mtmeitnerium

28

Ninickel58.69

46

Pdpalladium

106.4

78

Ptplatinum

195.1

110

Dsdarmstadtium

29

Cucopper

63.55

47

Agsilver107.9

79

Augold197.0

30

Znzinc

65.38(2)

48

Cdcadmium

112.4

80

Hgmercury

200.6

111

Rgroentgenium

112

Cncopernicium

114

Flflerovium

113

Uutununtrium

115

Uupununpentium

117

Uusununseptium

118

Uuoununoctium

116

Lvlivermorium

57

Lalanthanum

138.9

58

Cecerium140.1

59

Prpraseodymium

140.9

60

Ndneodymium

144.2

61

Pmpromethium

62

Smsamarium

150.4

63

Eueuropium

152.0

64

Gdgadolinium

157.3

65

Tbterbium

158.9

66

Dydysprosium

162.5

67

Hoholmium

164.9

68

Ererbium

167.3

69

Tmthulium

168.9

70

Ybytterbium

173.0

71

Lulutetium

175.0

89

Acactinium

90

Ththorium

232.0

91

Paprotactinium

231.0

92

Uuranium

238.0

93

Npneptunium

94

Puplutonium

95

Amamericium

96

Cmcurium

97

Bkberkelium

98

Cfcalifornium

99

Eseinsteinium

100

Fmfermium

101

Mdmendelevium

102

Nonobelium

103

Lrlawrencium

21

Scscandium

44.96

39

Yyttrium88.91

57-71

lanthanoids

89-103

actinoids

atomic number

Symbol

standard atomic weight

2 13 14 15 16 17 Key:

3 4 5 6 7 8 9 10 11 12

name

For notes and updates to this table, see www.iupac.org. This version is dated 8 January 2016. Copyright © 2016 IUPAC, the International Union of Pure and Applied Chemistry.

IUPAC Periodic Table of the Elements