1
H
Hydrogen
1.008
1
2
He
Helium
4.0026
2
3
Li
Lithium
6.94
2
1
4
Be
Beryllium
9.0122
2
2
5
B
Boron
10.81
2
3
6
C
Carbon
12.011
2
4
7
N
Nitrogen
14.007
2
5
8
O
Oxygen
15.999
2
6
9
F
Fluorine
18.998
2
7
10
Ne
Neon
20.18
2
8
11
Na
Sodium
22.99
2
8
1
12
Mg
Magnesium
24.305
2
8
2
13
Al
Aluminium
26.982
2
8
3
14
Si
Silicon
28.085
2
8
4
15
P
Phosphorus
30.974
2
8
5
16
S
Sulfur
32.06
2
8
6
17
Cl
Chlorine
35.45
2
8
7
18
Ar
Argon
39.948
2
8
8
19
K
Potassium
39.098
2
8
8
1
20
Ca
Calcium
40.078
2
8
8
2
21
Sc
Scandium
44.956
2
8
9
2
22
Ti
Titanium
47.867
2
8
10
2
23
V
Vanadium
50.942
2
8
11
2
24
Cr
Chromium
51.996
2
8
13
1
25
Mn
Manganese
54.938
2
8
13
2
26
Fe
Iron
55.845
2
8
14
2
27
Co
Cobalt
58.933
2
8
15
2
28
Ni
Nickel
58.693
2
8
16
2
29
Cu
Copper
63.546
2
8
18
1
30
Zn
Zinc
65.38
2
8
18
2
31
Ga
Gallium
69.723
2
8
18
3
32
Ge
Germanium
72.63
2
8
18
4
33
As
Arsenic
74.922
2
8
18
5
34
Se
Selenium
78.971
2
8
18
6
35
Br
Bromine
79.904
2
8
18
7
36
Kr
Krypton
83.798
2
8
18
8
37
Rb
Rubidium
85.468
2
8
18
8
1
38
Sr
Strontium
87.62
2
8
18
8
2
39
Y
Yttrium
88.906
2
8
18
9
2
40
Zr
Zirconium
91.224
2
8
18
10
2
41
Nb
Niobium
92.906
2
8
18
12
1
42
Mo
Molybdenum
95.95
2
8
18
13
1
43
Tc
Technetium
(98)
2
8
18
13
2
44
Ru
Ruthenium
101.07
2
8
18
15
1
45
Rh
Rhodium
102.91
2
8
18
16
1
46
Pd
Palladium
106.42
2
8
18
18
47
Ag
Silver
107.87
2
8
18
18
1
48
Cd
Cadmium
112.41
2
8
18
18
2
49
In
Indium
114.82
2
8
18
18
3
50
Sn
Tin
118.71
2
8
18
18
4
51
Sb
Antimony
121.76
2
8
18
18
5
52
Te
Tellurium
127.6
2
8
18
18
6
53
I
Iodine
126.9
2
8
18
18
7
54
Xe
Xenon
131.29
2
8
18
18
8
55
Cs
Caesium
132.91
2
8
18
18
8
1
56
Ba
Barium
137.33
2
8
18
18
8
2
57
La
Lanthanum
138.91
2
8
18
18
9
2
58
Ce
Cerium
140.12
2
8
18
19
9
2
59
Pr
Praseodymium
140.91
2
8
18
21
8
2
60
Nd
Neodymium
144.24
2
8
18
22
8
2
61
Pm
Promethium
144.24
2
8
18
23
8
2