|
Element
|
Symbol
|
Atomic number
|
Atomic mass
|
Element
|
Symbol
|
Atomic number
|
Atomic mass
|
|
Hydrogen
|
H
|
1
|
1.0079
|
Nickel
|
Ni
|
28
|
58.693
|
|
Helium
|
He
|
2
|
4.0026
|
Copper
|
Cu
|
29
|
63.546
|
|
Lithium
|
Li
|
3
|
6.941
|
Zinc
|
Zn
|
30
|
65.409
|
|
Beryllium
|
Be
|
4
|
9.0122
|
Gallium
|
Ga
|
31
|
69.723
|
|
Boron
|
B
|
5
|
10.811
|
Germanium
|
Ge
|
32
|
72.64
|
|
Carbon
|
C
|
6
|
12.011
|
Arsenic
|
As
|
33
|
74.922
|
|
Nitrogen
|
N
|
7
|
14.007
|
Selenium
|
Se
|
34
|
78.96
|
|
Oxygen
|
O
|
8
|
15.999
|
Bromine
|
Br
|
35
|
79.904
|
|
Fluorine
|
F
|
9
|
18.998
|
Krypton
|
Kr
|
36
|
83.798
|
|
Neon
|
Ne
|
10
|
20.180
|
Rubidium
|
Rb
|
37
|
85.468
|
|
Sodium
|
Na
|
11
|
22.990
|
Strontium
|
Sr
|
38
|
87.62
|
|
Magnesium
|
Mg
|
12
|
24.305
|
Palladium
|
Pd
|
46
|
106.42
|
|
Aluminium
|
Al
|
13
|
26.982
|
Silver
|
Ag
|
47
|
107.87
|
|
Silicon
|
Si
|
14
|
28.086
|
Cadmium
|
Cd
|
48
|
112.41
|
|
Phosphorus
|
P
|
15
|
30.974
|
Tin
|
Sn
|
50
|
118.71
|
|
Sulphur
|
S
|
16
|
32.065
|
Antimony
|
Sb
|
51
|
121.76
|
|
Chlorine
|
Cl
|
17
|
35.453
|
Tellurium
|
Te
|
52
|
127.60
|
|
Argon
|
Ar
|
18
|
39.948
|
Iodine
|
I
|
53
|
126.90
|
|
Pottasium
|
K
|
19
|
39.098
|
Xenon
|
Xe
|
54
|
131.29
|
|
Calcium
|
Ca
|
20
|
40.078
|
Caesium
|
Cs
|
55
|
132.91
|
|
Scandium
|
Sc
|
21
|
44.956
|
Barium
|
Ba
|
56
|
137.33
|
|
Titanium
|
Ti
|
22
|
47.867
|
Gold
|
Au
|
79
|
196.97
|
|
Vanadium
|
V
|
23
|
50.942
|
Mercury
|
Hg
|
80
|
200.59
|
|
Chromium
|
Cr
|
24
|
51.996
|
Lead
|
Pb
|
82
|
207.20
|
|
Manganese
|
Mn
|
25
|
54.938
|
Bismuth
|
Bi
|
83
|
208.98
|
|
Iron
|
Fe
|
26
|
55.845
|
Radium
|
Ra
|
88
|
226
|
|
Cobalt
|
Co
|
27
|
58.933
|
Thorium
|
Th
|
90
|
232.04
|
|
Element
|
Symbol
|
Atomic number
|
Atomic mass
|
Element
|
Symbol
|
Atomic number
|
Atomic mass
|
|
Hydrogen
|
H
|
1
|
1.0079
|
Nickel
|
Ni
|
28
|
58.693
|
|
Helium
|
He
|
2
|
4.0026
|
Copper
|
Cu
|
29
|
63.546
|
|
Lithium
|
Li
|
3
|
6.941
|
Zinc
|
Zn
|
30
|
65.409
|
|
Beryllium
|
Be
|
4
|
9.0122
|
Gallium
|
Ga
|
31
|
69.723
|
|
Boron
|
B
|
5
|
10.811
|
Germanium
|
Ge
|
32
|
72.64
|
|
Carbon
|
C
|
6
|
12.011
|
Arsenic
|
As
|
33
|
74.922
|
|
Nitrogen
|
N
|
7
|
14.007
|
Selenium
|
Se
|
34
|
78.96
|
|
Oxygen
|
O
|
8
|
15.999
|
Bromine
|
Br
|
35
|
79.904
|
|
Fluorine
|
F
|
9
|
18.998
|
Krypton
|
Kr
|
36
|
83.798
|
|
Neon
|
Ne
|
10
|
20.180
|
Rubidium
|
Rb
|
37
|
85.468
|
|
Sodium
|
Na
|
11
|
22.990
|
Strontium
|
Sr
|
38
|
87.62
|
|
Magnesium
|
Mg
|
12
|
24.305
|
Palladium
|
Pd
|
46
|
106.42
|
|
Aluminium
|
Al
|
13
|
26.982
|
Silver
|
Ag
|
47
|
107.87
|
|
Silicon
|
Si
|
14
|
28.086
|
Cadmium
|
Cd
|
48
|
112.41
|
|
Phosphorus
|
P
|
15
|
30.974
|
Tin
|
Sn
|
50
|
118.71
|
|
Sulphur
|
S
|
16
|
32.065
|
Antimony
|
Sb
|
51
|
121.76
|
|
Chlorine
|
Cl
|
17
|
35.453
|
Tellurium
|
Te
|
52
|
127.60
|
|
Argon
|
Ar
|
18
|
39.948
|
Iodine
|
I
|
53
|
126.90
|
|
Pottasium
|
K
|
19
|
39.098
|
Xenon
|
Xe
|
54
|
131.29
|
|
Calcium
|
Ca
|
20
|
40.078
|
Caesium
|
Cs
|
55
|
132.91
|
|
Scandium
|
Sc
|
21
|
44.956
|
Barium
|
Ba
|
56
|
137.33
|
|
Titanium
|
Ti
|
22
|
47.867
|
Gold
|
Au
|
79
|
196.97
|
|
Vanadium
|
V
|
23
|
50.942
|
Mercury
|
Hg
|
80
|
200.59
|
|
Chromium
|
Cr
|
24
|
51.996
|
Lead
|
Pb
|
82
|
207.20
|
|
Manganese
|
Mn
|
25
|
54.938
|
Bismuth
|
Bi
|
83
|
208.98
|
|
Iron
|
Fe
|
26
|
55.845
|
Radium
|
Ra
|
88
|
226
|
|
Cobalt
|
Co
|
27
|
58.933
|
Thorium
|
Th
|
90
|
232.04
|
