Peroxide Ion

Definition

A peroxide ion is a chemical species with the formula O2^2-. It's an ion composed of two oxygen atoms bonded together, each contributing one electron to form a bond and carrying an overall charge of -2.

Related terms

Hydrogen Peroxide:

This is a compound made up of two hydrogen atoms and a peroxide ion. It's often used as a disinfectant or bleach.

Oxidation State:

This refers to the degree of oxidation of an atom in a chemical compound; in peroxides, each oxygen has an oxidation state of -1.

Redox Reaction:

A type of chemical reaction involving transfers of electrons; formation or breakdown of peroxide ions can be part of redox reactions.