In detail

Oxidation number


What is meant by the oxidation number? Definition and explanation ...

The oxidation number respectively. oxidation state indicates the ionic charge of an atom. The illustration uses both Roman (+1, + II, + III) and Arabic (+1, +2, +3) numbers.
The value of the oxidation number is usually of a more theoretical nature, since atoms are usually located within chemical compounds. The oxidation number, however, refers to the charge that would exist if one considered the atom in isolation.

List of possible oxidation states of the main group elements:

Chem. ElementPossible oxidation states
aluminum0, 3
antimony-3, 0, 3, 5
argon0
arsenic-3, 0, 3, 5
astatine-1, 1, 0, 3, 5, 7
barium0, 2
beryllium0, 2
bismuth0, 3, 5
lead0, 2, 4
boron0, 3
bromine-1, 1, 0, 3, 5, 7
calcium0, 2
cesium0, 1
chlorine-1, 0, 1, 3, 5, 7
fluorine-1, 0
francium0, 1
gallium0, 3
germanium0, 2, 4
helium0
indium0, 1, 3
iodine-1, 1, 0, 3, 5, 7
potassium0, 1
carbon-4, -3, -2, -1, 0, 1, 2, 3, 4
krypton0, 2
lithium0, 1
magnesium0, 2
sodium0, 1
neon0
phosphorus-3, 0, 3, 5
polonium0, 2, 4, 6
radium0, 2
radon0, 2
rubidium0, 1
oxygen-2, -1, 0
sulfur-2, 0, 2, 4, 6
selenium-2, 0, 4, 6
silicon-4, 0, 4
nitrogen-3, -2, -1, 0, 1, 2, 3, 4, 5
strontium0, 2
tellurium-2, 0, 4, 6
hydrogen-1, 0, 1
xenon0, 2, 4, 6, 8
tin0, 2, 4