1

H

1.0079

2

He

4.0026

3

Li

6.941

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

20.180

11

Na

22.990

12

Mg

24.305

13

Al

26.982

14

Si

28.086

15

P

30.974

16

S

32.066

17

Cl

35.453

18

Ar

39.948

19

K

39.098

20

Ca

40.078

21

Sc

44.956

22

Ti

47.88

23

V

50.942

24

Cr

51.996

25

Mn

54.938

26

Fe

55.847

27

Co

58.933

28

Ni

58.69

29

Cu

63.546

30

Zn

65.39

31

Ga

69.723

32

Ge

72.61

33

As

74.922

34

Se

78.96

35

Br

79.904

36

Kr

83.80

37

Rb

85.468

38

Sr

87.62

39

Y

88.906

40

Zr

91.224

41

Nb

92.906

42

Mo

95.94

43

Tc

(98)

44

Ru

101.07

45

Rh

102.91

46

Pd

106.42

47

Ag

107.87

48

Cd

112.41

49

In

114.82

50

Sn

118.71

51

Sb

121.76

52

Te

127.60

53

I

126.90

54

Xe

131.29

55

Cs

132.91

56

Ba

137.33

57

La

138.91

72

Hf

178.49

73

Ta

180.95

74

W

183.84

75

Re

186.21

76

Os

190.23

77

Ir

192.22

78

Pt

195.08

79

Au

196.97

80

Hg

200.59

81

Tl

204.38

82

Pb

207.2

83

Bi

208.98

84

Po

(209)

85

At

(210)

86

Rn

(222)

87

Fr

(223)

88

Ra

226.03

89

Ac

227.03

104

Rf

(261)

105

Db

(262)

106

Sg

(263)

107

Bh

(262)

108

Hs

(265)

109

Mt

(266)

110

(269)

111

(272)

112

(277)

114

116

58

Ce

140.12

59

Pr

140.91

60

Nd

144.24

61

Pm

(145)

62

Sm

150.36

63

Eu

151.97

64

Gd

157.25

65

Tb

158.93

66

Dy

162.50

67

Ho

164.93

68

Er

167.26

69

Tm

168.94

70

Yb

173.04

71

Lu

174.97

90

Th

232.04

91

Pa

231.04

92

U

238.03

93

Np

237.05

94

Pu

(244)

95

Am

(243)

96

Cm

(247)

97

Bk

(247)

98

Cf

(251)

99

Es

(252)

100

Fm

(258)

101

Md

(258)

102

No

(259)

103

Lr

(260)