→
↓ 		123456789101112131415161718
1
1
H
1.00794
2
He
4.002602
2
3
Li
6.941
4
Be
9.012182
5
B
10.811
6
C
12.0107
7
N
14.0067
8
O
15.9994
9
F
18.9984032
10
Ne
20.1797
3
11
Na
22.98976928
12
Mg
24.305
13
Al
26.9815386
14
Si
28.0855
15
P
30.973762
16
S
32.065
17
Cl
35.453
18
Ar
39.948
4
19
K
39.0983
20
Ca
40.078
21
Sc
44.955912
22
Ti
47.867
23
V
50.9415
24
Cr
51.9961
25
Mn
54.938045
26
Fe
55.845
27
Co
58.933195
28
Ni
58.6934
29
Cu
63.546
30
Zn
65.38
31
Ga
69.723
32
Ge
72.63
33
As
74.9216
34
Se
78.96
35
Br
79.904
36
Kr
83.798
5
37
Rb
85.4678
38
Sr
87.62
39
Y
88.90585
40
Zr
91.224
41
Nb
92.90638
42
Mo
95.96
43
Tc
[98]
44
Ru
101.07
45
Rh
102.9055
46
Pd
106.42
47
Ag
107.8682
48
Cd
112.411
49
In
114.818
50
Sn
118.71
51
Sb
121.76
52
Te
127.6
53
I
126.90447
54
Xe
131.293
6
55
Cs
132.9054519
56
Ba
137.327
*
72
Hf
178.49
73
Ta
180.94788
74
W
183.84
75
Re
186.207
76
Os
190.23
77
Ir
192.217
78
Pt
195.084
79
Au
196.966569
80
Hg
200.59
81
Tl
204.3833
82
Pb
207.2
83
Bi
208.9804
84
Po
[210]
85
At
[210]
86
Rn
[222]
7
87
Fr
[223]
88
Ra
[226]
**
104
Rf
[267]
105
Db
[268]
106
Sg
[269]
107
Bh
[270]
108
Hs
[269]
109
Mt
[278]
110
Ds
[281]
111
Rg
[281]
112
Cn
[285]
113
Nh
[286]
114
Fl
[289]
115
Mc
[288]
116
Lv
[293]
117
Ts
[294]
118
Og
[294]
*
57
La
138.90547
58
Ce
140.116
59
Pr
140.90765
60
Nd
144.242
61
Pm
[145]
62
Sm
150.36
63
Eu
151.964
64
Gd
157.25
65
Tb
158.92535
66
Dy
162.5
67
Ho
164.93032
68
Er
167.259
69
Tm
168.93421
70
Yb
173.054
71
Lu
174.9668
**
89
Ac
[227]
90
Th
232.03806
91
Pa
231.03588
92
U
238.02891
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]