AP Chemistryeasymcq1 pt

A Lewis base is best defined as a species that:

A.donates a proton to another species

B.accepts an electron pair to form a covalent bond

C.donates an electron pair to form a covalent bond

D.releases OH⁻ when dissolved in water

Explanation

Core Concept

The Lewis model treats any covalent bond formed from one partner's lone pair as an acid-base event. The species supplying that pair is the Lewis base, while the acceptor is the Lewis acid. This is broader than proton-based definitions, so NH₃ bonding to BF₃ counts even though no H⁺ moves.

Correct Answer

Cdonates an electron pair to form a covalent bond

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