1
H
1.008
2
He
4.003
3
Li
6.94
4
Be
9.012
5
B
10.81
6
C
12.011
7
N
14.007
8
O
15.999
9
F
18.998
10
Ne
20.18
11
Na
22.99
12
Mg
24.305
13
Al
26.982
14
Si
28.085
15
P
30.974
16
S
32.06
17
Cl
35.45
18
Ar
39.948
19
K
39.098
20
Ca
40.078
21
Sc
44.956
22
Ti
47.867
23
V
50.942
24
Cr
51.996
25
Mn
54.938
26
Fe
55.845
27
Co
58.933
28
Ni
58.693
29
Cu
63.546
30
Zn
65.38
31
Ga
69.723
32
Ge
72.63
33
As
74.922
34
Se
78.971
35
Br
79.904
36
Kr
83.798
37
Rb
85.468
38
Sr
87.62
39
Y
88.906
40
Zr
91.224
41
Nb
92.906
42
Mo
95.95
43
Tc
98
44
Ru
101.07
45
Rh
102.906
46
Pd
106.42
47
Ag
107.868
48
Cd
112.414
49
In
114.818
50
Sn
118.71
51
Sb
121.76
52
Te
127.6
53
I
126.905
54
Xe
131.293
55
Cs
132.906
56
Ba
137.327
57
La
138.906
58
Ce
140.116
59
Pr
140.908
60
Nd
144.242
61
Pm
145
62
Sm
150.36
63
Eu
151.964
64
Gd
157.25
65
Tb
158.925
66
Dy
162.5
67
Ho
164.93
68
Er
167.259
69
Tm
168.934
70
Yb
173.045
71
Lu
174.967
72
Hf
178.49
73
Ta
180.948
74
W
183.84
75
Re
186.207
76
Os
190.23
77
Ir
192.217
78
Pt
195.084
79
Au
196.967
80
Hg
200.592
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
89
Ac
227
90
Th
232.038
91
Pa
231.036
92
U
238.029
93
Np
237
94
Pu
244
95
Am
243
96
Cm
247
97
Bk
247
98
Cf
251
99
Es
252
100
Fm
257
101
Md
258
102
No
259
103
Lr
266
104
Rf
267
105
Db
268
106
Sg
269
107
Bh
270
108
Hs
277
109
Mt
278
110
Ds
281
111
Rg
282
112
Cn
285
113
Nh
286
114
Fl
289
115
Mc
290
116
Lv
293
117
Ts
294
118
Og
294
alkali metalalkaline earth metaltransition metalpost-transition metalmetalloidnonmetalhalogennoble gaslanthanideactinide