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

Definition: A nonbonding electron is an electron in an atom that does not participate in bonding with other atoms.

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