Nonbonding Electron Definition

A nonbonding electron does not participate in a reaction.
A nonbonding electron does not participate in a reaction. Science Photo Library - MEHAU KULYK, Getty Images

A nonbonding electron is an electron in an atom that does not participate in bonding with other atoms. The term can refer to either a lone pair in which the electron is localized and associated with one atom or to a non-bonding orbital in which the electron is delocalized throughout a molecule.

Nonbonding Electron Example

The 1s orbital electrons of a lithium atom are nonbonding electrons. Bonds are formed with the 2s electron.