Hydrogen
1
H
1.008
Helium
2
He
4.003

Lithium
3
Li
6.940
Berylium
4
Be
9.012
Boron
5
B
10.810
Carbon
6
C
12.011
Nitrogen
7
N
14.007
Oxygen
8
O
15.999
Fluorine
9
F
18.998
Neon
10
Ne
20.180

Sodium
11
Na
22.990
Magnesium
12
Mg
24.305
Aluminium
13
Al
26.982
Silicon
14
Si
28.085
Phosphorus
15
P
30.974
Sulfur
16
S
32.066
Chlorine
17
Cl
35.450
Argon
18
Ar
39.948

Potassium
19
K
39.098
Calcium
20
Ca
40.078
Scandium
21
Sc
44.956
Titanium
22
Ti
47.867
Vanadium
23
V
50.942
Chronium
24
Cr
51.996
Manganese
25
Mn
54.938
Iron
26
Fe
55.845
Cobalt
27
Co
58.933
Nickel
28
Ni
58.693
Copper
29
Cu
63.546
Zinc
30
Zn
65.380
Gallium
31
Ga
69.723
Germanium
32
Ge
72.630
Arsenic
33
As
74.922
Selenium
34
Se
78.971
Bromine
35
Br
79.904
Krypton
36
Kr
83.798

Rubidium
37
Rb
85.468
Strontium
38
Sr
87.620
Yttrium
39
Y
88.906
Zirconium
40
Zr
91.224
Nobium
41
Nb
92.906
Molybdenum
42
Mo
95.950
Technetium
43
Tc
[98]
Ruthenium
44
Ru
101.070
Rhodium
45
Rh
102.906
Palladium
46
Pd
106.420
Silver
47
Ag
107.868
Cadium
48
Cd
112.414
Iridium
49
In
114.818
Tin
50
Sn
118.710
Antimony
51
Sb
121.760
Tellurium
52
Te
127.600
Iodine
53
I
126.904
Xenon
54
Xe
131.293

Caesium
55
Cs
132.905
Barium
56
Ba
137.327
La-Lu
Hafnium
72
Hf
178.490
Tantalum
73
Ta
180.948
Thungsten
74
W
183.840
Rhenium
75
Re
186.207
Osmium
76
Os
190.230
Iridium
77
Ir
192.217
Platinum
78
Pt
195.084
Gold
79
Au
196.967
Mercury
80
Hg
200.592
Thallium
81
Tl
204.380
Lead
82
Pb
207.200
Bismuth
83
Bi
208.980
Polonium
84
Po
(209)
Astatine
85
At
(210)
Radon
86
Rn
(222)

Francium
87
Fr
(223)
Radium
88
Ra
(226)
Ac-Lr
Rutherfordium
104
Rf
[267]
Dubnium
105
Db
[268]
Seaborgium
106
Sg
[269]
Bohrium
107
Bh
[270]
Hassium
108
Hs
[269]
Meitnerium
109
Mt
[278]
Darstadtium
110
Ds
[281]
Roetgenium
111
Rg
[281]
Copernicium
112
Cn
[285]
Ununtrium
113
Uut
[286]
Flerovium
114
Fl
[289]
Ununpentium
115
Uup
[289]
Livermorium
116
Lv
[293]
Ununseptium
117
Uus
[294]
Ununoctium
118
Uuo
[294]

Lanthanum
57
La
138.905
Cerium
58
Ce
140.116
Praseodymium
59
Pr
140.908
Neodymium
60
Nd
144.242
Promethium
61
Pm
[145]
Samarium
62
Sm
150.360
Europhium
63
Eu
151.964
Gadolinium
64
Gd
157.250
Terbium
65
Tb
158.925
Dysprosium
66
Dy
162.500
Holmium
67
Ho
164.930
Erbium
68
Er
167.259
Thulium
69
Tm
168.934
Ytterbium
70
Yb
173.054
Lutetium
71
Lu
174.967

Actinium
89
Ac
(227)
Thorium
90
Th
232.038
Protactinium
91
Pa
231.036
Uranium
92
U
238.029
Neptunium
93
Np
(237)
Plutonium
94
Pu
(244)
Americium
95
Am
(243)
Curium
96
Cm
(247)
Berkelium
97
Bk
(247)
Californium
98
Cf
(251)
Einsteinium
99
Es
(252)
Fermium
100
Fm
(257)
Mendelevium
101
Md
(258)
Nobelium
102
No
[259]
Lawrencium
103
Lr
[266]