Group

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Period

1

1 H 64.0

2 He 16.1

2

3 Li 9.29

4 Be 7.15

5 B 5.97

6 C 5.37

7 N 4.60

8 O 4.03

9 F 3.39

10 Ne 3.20

3

11 Na 2.80

12 Mg 2.65

13 Al 2.39

14 Si 2.30

15 P 2.08

16 S 2.01

17 Cl 1.82

18 Ar 1.61

4

19 K 1.65

20 Ca 1.60

21 Sc 1.434

22 Ti 1.35

23 V 1.27

24 Cr 1.24

25 Mn 1.17

26 Fe 1.15

27 Co 1.09

28 Ni 1.10

29 Cu 1.01

30 Zn 0.986

31 Ga 0.924

32 Ge 0.887

33 As 0.860

34 Se 0.816

35 Br 0.807

36 Kr 0.769

5

37 Rb 0.754

38 Sr 0.736

39 Y 0.725

40 Zr 0.707

41 Nb 0.694

42 Mo 0.672

43 Tc 0.658

44 Ru 0.638

45 Rh 0.627

46 Pd 0.606

47 Ag 0.598

48 Cd 0.574

49 In 0.562

50 Sn 0.543

51 Sb 0.530

52 Te 0.505

53 I 0.508

54 Xe 0.491

6

55 Cs 0.485

56 Ba 0.470

*

72 Hf 0.361

73 Ta 0.356

74 W 0.350

75 Re 0.346

76 Os 0.339

77 Ir 0.335

78 Pt 0.331

79 Au 0.327

80 Hg 0.321

81 TI 0.315

82 Pb 0.311

83 Bi 0.309

84 Po 0.309

85 At 0.307

86 Rn 0.290

7

87 Fr 0.289

88 Ra 0.285

**

104 Rf 0.241

105 Db 0.241

106 Sg 0.238

107 Bh 0.237

108 Hs 0.239

109 Mt 0.234

110 Ds 0.229

111 Rg 0.226

112 Cn 0.226

113 Uut 0.227

114 Fl 0.223

115 Uup 0.224

116 Lv 0.220

117 Uus 0.219

118 Uuo 0.219