Oxidation States
1
H
Hydrogen
-1
1
2
He
Helium
0
3
Li
Lithium
1
4
Be
Beryllium
2
5
B
Boron
3
6
C
Carbon
-4
2
4
7
N
Nitrogen
-3
-2
-1
1
2
3
4
5
8
O
Oxygen
-2
-1
1
2
9
F
Fluorine
-1
10
Ne
Neon
0
11
Na
Sodium
1
12
Mg
Magnesium
2
13
Al
Aluminium
3
14
Si
Silicon
-4
2
4
15
P
Phosphorus
-3
3
4
5
16
S
Sulphur
-2
2
4
6
17
Cl
Chlorine
-1
1
3
5
7
18
Ar
Argon
0
19
K
Potassium
1
20
Ca
Calcium
2
21
Sc
Scandium
3
22
Ti
Titanium
2
3
4
23
V
Vanadium
2
3
4
5
24
Cr
Chromium
-2
2
3
4
6
25
Mn
Manganese
-1
2
3
4
5
6
7
26
Fe
Iron
-2
2
3
27
Co
Cobalt
-1
2
3
28
Ni
Nickel
-1
2
3
29
Cu
Copper
1
2
30
Zn
Zinc
2
31
Ga
Galium
3
32
Ge
Germanium
2
4
33
As
Arsenic
-3
3
5
34
Se
Selenium
-2
2
4
6
35
Br
Bromine
-1
1
3
5
7
36
Kr
Krypton
0
2
4
37
Rb
Rubidium
1
38
Sr
Strontium
2
39
Y
Yttrium
3
40
Zr
Zirconium
3
4
41
Nb
Niobium
-1
3
5
42
Mo
Molybdenum
-2
2
3
4
5
6
43
Tc
Technetium
-1
4
7
44
Ru
Ruthenium
-2
2
3
4
6
8
45
Rh
Rhodium
-2
2
3
4
46
Pd
Palladium
2
4
47
Ag
Silver
1
2
48
Cd
Cadmium
2
49
In
Indium
3
50
Sn
Tin
2
4
51
Sb
Antimony
-3
3
5
52
Te
Tellurium
-2
2
4
6
53
I
Iodine
-1
1
5
7
54
Xe
Xenon
0
2
4
6
8
55
Cs
Caesium
1
56
Ba
Barium
2
57
La
Lanthanum
3
58
Ce
Cerium
3
4
59
Pr
Praseodymium
3
60
Nd
Neodymium
3
61
Pm
Promethium
3
62
Sm
Samarium
2
3
63
Eu
Europium
2
3
64
Gd
Gadolinium
2
3
65
Tb
Terbium
3
4
66
Dy
Dysprosium
3
67
Ho
Holmium
3
68
Er
Erbium
3
69
Tm
Thulium
2
3
70
Yb
Ytterbium
2
3
71
Lu
Lutetium
3
72
Hf
Hafnium
4
73
Ta
Tantalum
5
74
W
Tungsten
-2
-2
2
3
4
5
6
75
Re
Rhenium
-1
2
4
6
7
76
Os
Osmium
-2
2
3
4
6
8
77
Ir
Iridium
-1
1
2
3
4
6
78
Pt
Platinum
2
4
79
Au
Gold
1
3
80
Hg
Mercury
1
2
81
Tl
Thallium
1
3
82
Pb
Lead
2
4
83
Bi
Bismuth
3
5
84
Po
Polonium
2
4
85
At
Astatine
-1
1
3
5
7
86
Rn
Radon
0
2
87
Fr
Francium
1
88
Ra
Radium
2
89
Ac
Actinium
3
90
Th
Thorium
4
91
Pa
Protactinium
4
5
92
U
Uranium
3
4
5
6
93
Np
Neptunium
3
4
5
6
94
Pu
Plutonium
3
4
5
6
94
Am
Americium
3
4
5
6
96
Cm
Curium
3
4
97
Bk
Berkelium
3
4
98
Cf
Californium
3
4
99
Es
Einsteinium
3
100
Fm
Fermium
3
101
Md
Mendelevium
2
3
102
No
Nobelium
2
3
103
Lw
Lawrencium
3
104
Rf
Rutherfordium
4
105
Db
Dubnium
5