1
H
1.008

2
He
4.003

3
Li
6.939

4
Be
9.012

5
B
10.81

6
C
12.01

7
N
14.01

8
O
16.00

9
F
19.00

10
Ne
20.18

11
Na
22.99

12
Mg
24.30

13
Al
26.98

14
Si
28.09

15
P
30.97

16
S
32.07

17
Cl
35.05

18
Ar
39.95

19
K
39.10

20
Ca
40.08

21
Sc
44.96

22
Ti
47.87

23
V
50.94

24
Cr
52.00

25
Mn
54.94

26
Fe
55.85

27
Co
58.93

28
Ni
58.69

29
Cu
63.55

30
Zn
65.39

31
Ga
69.72

32
Ge
72.61

33
As
74.92

34
Se
78.96

35
Br
79.90

36
Kr
83.80

37
Rb
85.47

38
Sr
87.62

39
Y
88.91

40
Zr
91.22

41
Nb
92.91

42
Mo
95.94

43
Tc
98.91

44
Ru
101.1

45
Rh
102.9

46
Pd
106.4

47
Ag
107.9

48
Cd
112.4

49
In
114.8

50
Sn
118.7

51
Sb
121.8

52
Te
127.6

53
I
126.9

54
Xe
131.3

55
Cs
123.9

56
Ba
137.3

71
Lu
 

72
Hf
178.5

73
Ta
108.8

74
W
183.8

75
Re
186.2

76
Os
190.2

77
Ir
192.2

78
Pt
195.1

79
Au
197.0

80
Hg
200.6

81
Tl
204.4

82
Pb
207.2

83
Bi
209.0

84
Po
210.0

85
At
210.0

86
Rn
222.0

87
Fr
223.0

88
Ra
226.0

103
Lr
 

104
Db
 

105
Ji
 

106
Rf
 

107
Bh
 

108
Hn
 

109
Mt
 

110
Uun
 

111
Uuu
 

57
La
138.9

58
Ce
140.1

59
Pr
140.

60
Nd
144.2

61
Pm
146.9

62
Sm
150.4

63
Eu
152.0

64
Gd
157.2

65
Tb
158.9

66
Dy
162.5

67
Ho
164.9

68
Er
167.3

69
Tm
168.9

70
Yb
173.0

71
Lu
175.0

89
Ac
227.0

90
Th
232.0

91
Pa
231.0

92
U
238.0

93
Np
237.0

94
Pu
239.1

95
Am
241.1.

96
Cm
244.1

97
Bk
249.1

98
Cf
252.1

99
Es
252.1

100
Fm
257.1

101
Md
258.1

102
No
259.1

103
Lr
262.1