(or oxidation states) Used to determine which is oxidized and which is reduced.

A chemical reaction in which electrons are transferred from an atom that is oxidized to an atom that is reduced.

Oxidation: loss of electrons

Reduction: gain of electrons

LEO the lion says GER: Loosing Electrons is Oxidation; Gaining Electrons is Reduction

Elements in neutral form have oxidation number of 0.

Of a monotonic ion, oxidation number is the same as its charge.

Nonmetals tend to have negative oxidation numbers, although some are positive in certain compounds or ions

Sum of oxidation numbers of neutral compound is 0.

The sum of the oxidation numbers in a polyatomic ion is the charge on the ion.

Substance that is reduced. It makes it possible for another substance to be oxidized.

Substance that is reduced. It makes it possible for another substance to be oxidized.