cation

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cation

The Columbia Encyclopedia, Sixth Edition | 2008 | The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information) Copyright

cation , atom or group of atoms carrying a positive charge. The charge results because there are more protons than electrons in the cation. Cations can be formed from a metal by oxidation (see oxidation and reduction ), from a neutral base (see acids and bases ) by protonation, or from a polar compound by ionization. Cationic species include Na + , Mg ++ , and NH 4+ . The cations of the transition elements have characteristic colors in water solution. Salts are made up of cations and anions . See ion .

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cation

A Dictionary of Food and Nutrition | 2005 | | © A Dictionary of Food and Nutrition 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

cation Chemical term for a positively charged ion.
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DAVID A. BENDER. "cation." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 10 Jul. 2009 <http://www.encyclopedia.com>.

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cation

World Encyclopedia | 2005 | © World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

cation Positive ion that is attracted to the cathode during electrolysis.
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