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| Lew·is base (plural Lew·is bas·es) |
noun |
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| Definition: |
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1. substance donating electrons for bond: a substance that can donate a pair of electrons to an acid to form a covalent bond
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2. substance that donates electron pair: a substance that donates an electron pair to an acid during the formation of a covalent bond
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| [Mid-20th century. After Gilbert Newton Lewis] |
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