anion

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anion

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

anion , atom or group of atoms carrying a negative charge. The charge results because there are more electrons than protons in the anion. Anions can be formed from nonmetals by reduction (see oxidation and reduction ) or from neutral acids (see acids and bases ) or polar compounds by ionization. Anionic species include Cl - , SO 4-- , and CH 3 COO - . Highly colored intermediates in organic reactions are often radical anions (anions containing an unpaired electron). Salts are made up of anions and cations . See ion .

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anion

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

anion A negatively charged ion.
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DAVID A. BENDER. "anion." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 9 Jul. 2009 <http://www.encyclopedia.com>.

DAVID A. BENDER. "anion." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (July 9, 2009). http://www.encyclopedia.com/doc/1O39-anion.html

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anion

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

anion Negative ion attracted to the anode (positive electrode) during electrolysis.

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