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Lone pair

Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team • Last updated August 2025

Definition

A pair of valence electrons that are not involved in bonding and occupy space around an atom; affects molecular geometry and bond angles through electron-pair repulsion.

AP course connection

Topic 2.7: 2.7 VSEPR and Bond Hybridization

Unit 2

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Lone pair Definition for AP Chemistry | Fiveable