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I

II

IIIb

IVb

Vb

VIb

VIIb

VIIIb

Ib

IIb

III

IV

V

VI

VII

VIII

1H 1.0079

2He 4.0026

3Li 6.9412

4Be 9.0121

5B 10.811

6C 12.010

7N 14.006

8O 15.999

9F 18.998

10Ne 20.179

11Na 22.989

12Mg 24.305

13Al 26.981

14Si 28.085

15P 30.973

16S 32.065

17Cl 35.453

18Ar 39.948

19K 39.098

20Ca 40.078

21Sc 44.955

22Ti 47.867

23V 50.941

24Cr 51.996

25Mn 54.938

26Fe 55.845

27Co 58.933

28Ni 58.693

29Cu 63.546

30Zn 65.409

31Ga 69.723

32Ge 72.641

33As 74.921

34Se 78.963

35Br 79.904

36Kr 83.798

37Rb 85.467

38Sr 87.621

39Y 88.905

40Zr 91.224

41Nb 92.906

42Mo 95.942

43Tc 98.906

44Ru 101.07

45Rh 102.90

46Pd 106.42

47Ag 107.86

48Cd 112.41

49In 114.81

50Sn 118.71

51Sb 121.76

52Te 127.60

53I 126.90

54Xe 131.29

55Cs 132.90

56Ba 137.32

57La 138.90

72Hf 178.49

73Ta 180.94

74W 183.84

75Re 186.20

76Os 190.23

77Ir 192.21

78Pt 195.08

79Au 196.96

80Hg 200.59

81Tl 204.38

82Pb 207.21

83Bi 208.98

84Po 208.98

85At 209.98

86Rn 222.01

87Fr 223.01

88Ra 226.02

89Ac 227.02

104Rf 261.10

105Db 262.11

106Sg 266.12

107Bh 264.12

108Hs

109Mt

110Ds

111Rg

112Cn

113Uut

114Fl

115Uup

116Lv

117Uus

118Uuo

Lanthanoids

58Ce 140.11

59Pr 140.90

60Nd 144.24

61Pm 146.91

62Sm 150.36

63Eu 151.96

64Gd 157.25

65Tb 158.92

66Dy 162.50

67Ho 164.93

68Er 167.25

69Tm 168.93

70Yb 173.04

71Lu 174.96

Actinoids

90Th 232.03

91Pa 231.03

92U 238.02

93Np 237.04

94Pu 244.06

95Am 243.06

96Cm 247.07

97Bk 247.07

98Cf 251.07

99Es 252.08

100Fm 257.09

101Md 258.09

102No 259.10

103Lr 260.10

Alkali metals Alkali earth metals Transition metals Other metals Semi-metals Non-metals Noble gases

Li	Lithium	Li
Atomic number 3 Atomic weight 6.9412 amu Density 0.534 g/cm3 (STP) Melting 180.7 °C Boiling 1317 °C Covalent radius 1.34 Å Van der Waals radius 1.82 Å Ionic radius 0.76 Å First ionization potential 5.391 eV = 43485 cm-1 = 520.2 kJ/mol Electron affinity -0.622 eV = -5016 cm-1 = -60.0 kJ/mol Electronic configuration 1s22s1 Stable and very long lived isotopes 6Li: 7.5%, 7Li: 92.5% Wikipedia article about Lithium