2
He
Helium
4.0026
3
Li
Lithium
6.941
4
Be
Beryllium
9.0122
5
B
Boron
10.811
10
Ne
Neon
20.1797
11
Na
Sodium
22.9897
12
Mg
Magnesium
24.305
13
Al
Aluminium
26.9815
14
Si
Silicon
28.0855
18
Ar
Argon
39.948
19
K
Potassium
39.0983
20
Ca
Calcium
40.078
21
Sc
Scandium
44.9559
22
Ti
Titanium
47.867
23
V
Vanadium
50.9415
24
Cr
Chromium
51.9961
25
Mn
Manganese
54.938
26
Fe
Iron
55.845
27
Co
Cobalt
58.9332
28
Ni
Nickel
58.6934
29
Cu
Copper
63.546
30
Zn
Zinc
65.39
31
Ga
Gallium
69.723
32
Ge
Germanium
72.64
33
As
Arsenic
74.9216
36
Kr
Krypton
83.8
37
Rb
Rubidium
85.4678
38
Sr
Strontium
87.62
39
Y
Yttrium
88.9059
40
Zr
Zirconium
91.224
41
Nb
Niobium
92.9064
42
Mo
Molybdenum
95.94
43
Tc
Technetium
98
44
Ru
Ruthenium
101.07
45
Rh
Rhodium
102.9055
46
Pd
Palladium
106.42
47
Ag
Silver
107.8682
48
Cd
Cadmium
112.411
49
In
Indium
114.818
50
Sn
Tin
118.71
51
Sb
Antimony
121.76
52
Te
Tellurium
127.6
54
Xe
Xenon
131.293
55
Cs
Cesium
132.9055
56
Ba
Barium
137.327
72
Hf
Hafnium
178.49
73
Ta
Tantalum
180.9479
74
W
Tungsten
183.84
75
Re
Rhenium
186.207
76
Os
Osmium
190.23
77
Ir
Iridium
196.9665
78
Pt
Platinum
192.217
79
Au
Gold
195.078
80
Hg
Mercury
200.59
81
Tl
Thallium
204.3833
82
Pb
Lead
207.2
83
Bi
Bismuth
208.9804
84
Po
Polonium
209
85
At
Astatine
210
86
Rn
Radon
222
87
Fr
Francium
223
88
Ra
Radium
226
104
Rf
Rutherfordium
261
105
Db
Dubnium
262
106
Sg
Seaborgium
266
107
Bh
Bohrium
264
108
Hs
Hassium
277
109
Mt
Meitnerium
268
110
Ds
Darmstadtium
261.9
111
Rg
Roentgenium
271.8
112
Cn
Copernicium
285
113
Nh
Nihonium
286
114
Fl
Flerovium
289
115
Mc
Moscovium
288
116
Lv
Livermorium
293
117
Ts
Tennessine
260.9
118
Og
Oganesson
294
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