Oxidation Numbers

The oxidation numbers of an element denote the positive or negative charge of an atom in a certain chemical compund. This is based on the hypothetical assumption that all atoms of the compound are ions.

The oxidation numbers are usefull when setting up redox-equations. The table entries set in red color are the most important oxidation numbers.

Z	Name	Oxidation Numbers
1	Hydrogen	1, -1
2	Helium	--
3	Lithium	1
4	Beryllium	2
5	Boron	3
6	Carbon	4, 2, -4
7	Nitrogen	5, 4, 3, 2, -3
8	Oxygen	-2, -1
9	Fluorine	-1
10	Neon	--
11	Sodium	1
12	Magnesium	2
13	Aluminium	3
14	Silicon	4, 2, -4
15	Phosphorus	5, 3, -3
16	Sulfur	6, 4, 2, -2
17	Chlorine	7, 5, 3, 1, -1
18	Argon	--
19	Potassium	1
20	Calcium	2
21	Scandium	3
22	Titanium	4, 3, 2
23	Vanadium	5, 4, 3, 2, 1, 0, -1, -3
24	Chromium	6, 5, 4, 3, 2, 1, 0, -1, -2
25	Manganese	7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3
26	Iron	6, 4, 5, 3, 2, 1, 0, -1, -2
27	Cobalt	5, 4, 3, 2, 1, 0, -1
28	Nickel	4, 3, 2, 1, 0, -1
29	Copper	4, 3, 2, 1
30	Zinc	2
31	Gallium	3, 2, 1
32	Germanium	4, 2
33	Arsenic	5, 3, -3
34	Selenium	6, 4, -2
35	Bromine	7, 5, 3, 1, -1
36	Krypton	2
37	Rubidium	1
38	Strontium	2
39	Yttrium	3
40	Zirconium	4, 3, 2, 1
41	Niobium	5, 4, 3, 2, 1, -1
42	Molybdenum	6, 5, 4, 3, 2, 1, 0, -1, -2
43	Technetium	7, 6, 5, 4, 3, 2, 1, 0, -1, -3
44	Ruthenium	8, 7, 6, 5, 4, 3, 2, 1, 0, -2
45	Rhodium	6, 5, 4, 3, 2, 1, 0, -1
46	Palladium	4, 3, 2, 0
47	Silver	3, 2, 1
48	Cadmium	2, 1
49	Indium	3, 2, 1
50	Tin	4, 2
51	Antimony	5, 3, -3
52	Tellurium	6, 4, 2, -2
53	Iodine	7, 5, 3, 1, -1
54	Xenon	2, 4, 6, 8
55	Caesium	1
56	Barium	2
57	Lanthanum	3
58	Cerium	4, 3
59	Praseodymium	4, 3
60	Neodymium	3
61	Promethium	3
62	Samarium	3, 2
63	Europium	3, 2
64	Gadolinium	3
65	Terbium	4, 3
66	Dysprosium	3
67	Holmium	3
68	Erbium	3
69	Thulium	3, 2
70	Ytterbium	3, 2
71	Lutetium	3
72	Hafnium	4, 3, 1
73	Tantalum	5, 4, 3, 2, 1, -1
74	Tungsten	6, 5, 4, 3, 2, 0, -1, -2
75	Rhenium	7, 6, 5, 4, 3, 2, 1, 0, -1, -3
76	Osmium	8, 6, 5, 4, 3, 2, 1, 0, -2
77	Iridium	6, 5, 4, 3, 2, 1, 0, -1
78	Platinum	6, 5, 4, 2, 0
79	Gold	5, 3, 2, 1
80	Mercury	2, 1
81	Thallium	3, 1
82	Lead	4, 2
83	Bismuth	5, 3
84	Polonium	6, 4, 2
85	Astatine	7, 5, 3, 1, -1
86	Radon	2
87	Francium	1
88	Radium	2
89	Actinium	3
90	Thorium	4, 3, 2
91	Protactinium	5, 4, 3
92	Uranium	6, 5, 4, 3
93	Neptunium	7, 6, 5, 4, 3
94	Plutonium	7, 6, 5, 4, 3
95	Americium	6, 5, 4, 3
96	Curium	4, 3
97	Berkelium	4, 3
98	Californium	4, 3
99	Einsteinium	3
100	Fermium	3
101	Mendelevium	3
102	Nobelium	3, 2
103	Lawrencium	3
104	Rutherfordium	n.n.
105	Dubnium	n.n.
106	Seaborgium	n.n.
107	Bohrium	n.n.
108	Hassium	n.n.
109	Meitnerium	n.n.
110	Unnunnilium	n.n.
111	Unnununium	n.n.