1
H
Hydrogen
1.008
2
He
Helium
4.0026
3
Li
Lithium
6.94
4
Be
Beryllium
9.0122
5
B
Boron
10.81
6
C
Carbon
12.011
7
N
Nitrogen
14.007
8
O
Oxygen
15.999
9
F
Fluorine
18.998
10
Ne
Neon
20.180
11
Na
Sodium
22.990
12
Mg
Magnesium
24.305
13
Al
Aluminum
26.982
14
Si
Silicon
28.085
15
P
Phosphorus
30.974
16
S
Sulfur
32.06
17
Cl
Chlorine
35.45
18
Ar
Argon
39.948
19
K
Potassium
39.098
20
Ca
Calcium
40.078
21
Sc
Scandium
44.956
22
Ti
Titanium
47.867
23
V
Vanadium
50.942
24
Cr
Chromium
51.996
25
Mn
Manganese
54.938
26
Fe
Iron
55.845
27
Co
Cobalt
58.933
28
Ni
Nickel
58.693
29
Cu
Copper
63.546
30
Zn
Zinc
65.38
31
Ga
Gallium
69.723
32
Ge
Germanium
72.630
33
As
Arsenic
74.922
34
Se
Selenium
78.971
35
Br
Bromine
79.904
36
Kr
Krypton
83.798
37
Rb
Rubidium
85.468
38
Sr
Strontium
87.62
39
Y
Yttrium
88.906
40
Zr
Zirconium
91.224
41
Nb
Niobium
92.906
42
Mo
Molybdenum
95.95
43
Tc
Technetium
98
44
Ru
Ruthenium
101.07
45
Rh
Rhodium
102.91
46
Pd
Palladium
106.42
47
Ag
Silver
107.87
48
Cd
Cadmium
112.41
49
In
Indium
114.82
50
Sn
Tin
118.71
51
Sb
Antimony
121.76
52
Te
Tellurium
127.60
53
I
Iodine
126.90
54
Xe
Xenon
131.29
55
Cs
Cesium
132.91
56
Ba
Barium
137.327
57
La
Lanthanum
138.90547
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.90766
60
Nd
Neodymium
144.242
61
Pm
Promethium
145
62
Sm
Samarium
150.36
63
Eu
Europium
151.964
64
Gd
Gadolinium
157.25
65
Tb
Terbium
158.92535
66
Dy
Dysprosium
162.500
67
Ho
Holmium
164.93033
68
Er
Erbium
167.259
69
Tm
Thulium
168.93422
70
Yb
Ytterbium
173.045
71
Lu
Lutetium
174.9668
72
Hf
Hafnium
178.49
73
Ta
Tantalum
180.94788
74
W
Tungsten
183.84
75
Re
Rhenium
186.207
76
Os
Osmium
190.23
77
Ir
Iridium
192.217
78
Pt
Platinum
195.084
79
Au
Gold
196.966569
80
Hg
Mercury
200.592
81
Tl
Thallium
204.38
82
Pb
Lead
207.2
83
Bi
Bismuth
208.98040
84
Po
Polonium
209
85
At
Astatine
210
86
Rn
Radon
222
87
Fr
Francium
223
88
Ra
Radium
226
89
Ac
Actinium
227
90
Th
Thorium
232.0377
91
Pa
Protactinium
231.03588
92
U
Uranium
238.02891
93
Np
Neptunium
237
94
Pu
Plutonium
244
95
Am
Americium
243
96
Cm
Curium
247
97
Bk
Berkelium
247
98
Cf
Californium
251
99
Es
Einsteinium
252
100
Fm
Fermium
257
101
Md
Mendelevium
258
102
No
Nobelium
259
103
Lr
Lawrencium
266
104
Rf
Rutherfordium
267
105
Db
Dubnium
268
106
Sg
Seaborgium
269
107
Bh
Bohrium
270
108
Hs
Hassium
269
109
Mt
Meitnerium
278
110
Ds
Darmstadtium
281
111
Rg
Roentgenium
282
112
Cn
Copernicium
285
113
Nh
Nihonium
286
114
Fl
Flerovium
289
115
Mc
Moscovium
289
116
Lv
Livermorium
293
117
Ts
Tennessine
294
118
Og
Oganesson
294