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A cation (pronounced with a hard "t", as in "cat eye on") is a positively charged ion.[1] It is the opposite of an anion. It is so named because, during electrolysis, it migrates toward the cathode. Cations are typically metal ions. In a sodium chloride solution the Na+ ions are cations and the Cl- ions are anions.


  1. Wile, Dr. Jay L. Exploring Creation With Chemistry. Apologia Educational Ministries, Inc. 1998