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- Dictionarylone pair
noun
- 1. a pair of electrons occupying an orbital in an atom or molecule and not directly involved in bonding.
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noun
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Pair of valence electrons that are not shared with another atom; concept used in valence shell electron pair repulsion theory which explains the shapes of molecules
In chemistry, a lone pair refers to a pair of valence electrons that are not shared with another atom in a covalent bond and is sometimes called an unshared pair or non-bonding pair. Lone pairs are found in the outermost electron shell of atoms. They can be identified by using a Lewis structure. Electron pairs are therefore considered lone pairs if two electrons are paired but are not used in chem... Wikipedia