Oxidation numbers

Definition

Oxidation numbers are hypothetical charges assigned to atoms in a compound or ion to indicate the distribution of electrons. They help us determine if an atom has gained or lost electrons during a chemical reaction.

Related terms

Ionic bond: A type of chemical bond that forms between two oppositely charged ions.

Reduction: The process in which an atom gains electrons and decreases its oxidation number.

Oxidation:

The process in which an atom loses electrons and increases its oxidation number.