1

H

1.008

2

He

4.003

3

Li

6.939

4

Be

9.0122

5

B

10.811

6

C

12.011

7

N

14.007

8

O

15.999

9

F

18.998

10

Ne

20.l83

11

Na

22.99

12

Mg

24.312

13

AJ

26.982

14

Si

28.086

15

P

30.974

16

S

32.064

17

CI

35.453

18

Ar

39.948

19

K

39.102

20

Ca

40.08

21

Sc

44.956

22

Ti

47.9

23

V

50.942

24

Cr

51.996

25

Mn

54.938

26

Fe

55.847

27

Co

58.933

28

Ni

58.71

29

Cu

63.546

30

Zn

65.37

31

Ga

69.72

32

Ge

72.59

33

As

74.922

34

Se

78.96

35

Br

79.904

36

Kr

83.8

37

Rb

85.47

38

Sr

87.62

39

Y

88.905

40

Zr

91.22

41

Nb

92.906

42

Mo

95.94

43

Tc

97

44

Ru

101.07

45

Rh

102.91

46

Pd

106.4

47

Ag

107.87

48

Cd

112.4

49

In

114.82

50

Sn

118.69

51

Sb

121.75

52

Te

127.6

53

I

126.9

54

Xe

131.3

55

Cs

132.91

56

Ba

137.34

57

La

138.91

72

Hf

178.49

73

Ta

180.95

74

W

183.85

75

Re

186.2

76

Os

190.2

77

Ir

192.2

78

Pt

195.09

79

Au

196.97

80

Hg

200.59

81

Tl

204.37

82

Pb

207.19

83

Bi

208.96

84

Po

210

85

At

210

86

Rn

222

87

Fr

215

88

Ra

226.03

89

Ac

227.03

104

Rt

261

105

Db

262

106

Sg

266

107

Bh

264

108

Hs

269

109

Mt

258

110

 

271

111

 

272

112

 

277

114

 

289

116

 

289

58

Ce

140.12

59

Pr

140.91

60

Nd

144.24

61

Pm

145

62

Sm

150.35

63

Eu

151.96

64

Gd

157.25

65

Tb

158.92

66

Dy

162.5

67

Ho

164.93

68

Er

167.26

69

Tm

168.93

70

Yb

173.04

71

Lu

174.97

90

Th

232.04

91

Pa

231

92

U

238.03

93

Np

237.05

94

Pu

239.05

95

Am

241.06

96

Cm

244.06

97

Bk

249.08

98

Cf

252.08

99

Es

252.08

100

Fm

257.1

101

Md

258.1

102

No

259.1

103

Lr

262.11