1
H
1.01
2
He
4.00
3
Li
6.94
4
Be
9.01
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
24.31
13
Al
26.98
14
Si
28.09
15
P
30.97
16
S
32.06
17
Cl
35.45
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
65.38
31
Ga
69.72
32
Ge
72.63
33
As
74.92
34
Se
78.97
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
95.95
43
Tc
98.00
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
207.21
83
Bi
208.98
84
Po
209.00
85
At
210.00
86
Rn
222.00
87
Fr
223.00
88
Ra
226.00
89
Ac
227.00
104
Rf
267.00
105
Db
268.00
106
Sg
269.00
107
Bh
270.00
108
Hs
269.00
109
Mt
278.00
110
Ds
281.00
111
Rg
282.00
112
Cn
285.00
113
Nh
286.00
114
Fl
289.00
115
Mc
289.00
116
Lv
293.00
117
Ts
294.00
118
Og
294.00
58
Ce
140.12
59
Pr
140.91
60
Nd
144.24
61
Pm
145.00
62
Sm
150.36
63
Eu
151.96
64
Gd
157.25
65
Tb
158.93
66
Dy
162.50
67
Ho
164.93
68
Er
167.26
69
Tm
168.93
70
Yb
173.05
71
Lu
174.97
90
Th
232.04
91
Pa
231.04
92
U
238.03
93
Np
237.00
94
Pu
244.00
95
Am
243.00
96
Cm
247.00
97
Bk
247.00
98
Cf
251.00
99
Es
252.00
100
Fm
257.00
101
Md
258.00
102
No
259.00
103
Lr
266.00