1
H
1.0079
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
20.180
11
Na
22.990
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
39.949
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
56.845
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
126.904
54
Xe
131.293
55
Cs
132.905
56
Ba
137.327
#
La-Lu
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
208.980
84
Po
(209)
85
At
(210)
86
Rn
(222)
87
Fr
(223)
88
Ra
(226)
#
Ac-Lr
104
Rf
(267)
105
Db
(270)
106
Sg
(269)
107
Bh
(270)
108
Hs
(270)
109
Mt
(278)
110
Ds
(281)
111
Rg
(281)
112
Cn
(285)
113
Nh
(286)
114
Fl
(289)
115
Mc
(289)
116
Lv
(293)
117
Ts
(293)
118
Og
(294)
57
La
138.905
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
Ib
158.925
66
Dy
162.5
67
Ho
164.930
68
Er
167.259
69
Tm
168.934
70
Yb
173.045
71
Lu
174.967
89
Ac
(227)
90
Th
232.038
91
Pa
(231)
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
(262)