Ion

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Revision as of 12:30, 19 August 2020 by imported>Mark Widmer (Changed "gains an electron" to "gains one or more electrons")
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An ion is an atom or a molecule that has lost or gained electrons. If an atom loses one or more electrons, it becomes a positively charged ion called a cation. If it gains one or more electrons, it becomes a negatively charged ion called an anion.