Share this Article on Facebook Twitter Submit this article to Reddit Give this article a thumbs-up on StumbleUpon

anion

anion

The Columbia Encyclopedia, 6th ed. | 2008 | 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 .

Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"anion." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

"anion." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1E1-anion.html

"anion." The Columbia Encyclopedia, 6th ed.. 2008. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-anion.html

Learn more about citation styles

anion

A Dictionary of Nursing | 2008 | Copyright

anion (an-I-ŏn) n. a negatively charged ion, which moves towards the anode (positive electrode) when an electric current is passed through the solution containing it. Compare cation. a. gap the difference between the concentrations of cations (positively charged ions) and anions, calculated from the formula (Na+ + K+) – (HCO3− + Cl−): it is used to estimate the unaccounted-for anions in the blood in cases of metabolic disturbance.
Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"anion." A Dictionary of Nursing. 2008. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

"anion." A Dictionary of Nursing. 2008. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O62-anion.html

"anion." A Dictionary of Nursing. 2008. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-anion.html

Learn more about citation styles

anion

A Dictionary of Ecology | 2004 | | Copyright

anion A negative ion, i.e. an atom, or complex of atoms, that has gained one or more electrons and thereby carries a negative electric charge (e.g. Cl−, OH−, and SO2−4). It is so called because when an electric current is passed through a conducting solution the negative ions present in the solution are attracted to the anode (the positive electrode). Compare cation.
Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

MICHAEL ALLABY. "anion." A Dictionary of Ecology. 2004. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "anion." A Dictionary of Ecology. 2004. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O14-anion.html

MICHAEL ALLABY. "anion." A Dictionary of Ecology. 2004. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-anion.html

Learn more about citation styles

anion

A Dictionary of Earth Sciences | 1999 | | Copyright

anion A negative ion, i.e. an atom, or complex of atoms, that has gained one or more electrons and thereby carries a negative electric charge, e.g. Cl−, OH−, and SO42−. So-called because when an electric current is passed through a conducting solution the negative ions present in the solution are attracted to the anode (the positive electrode). Compare CATION.
Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

AILSA ALLABY and MICHAEL ALLABY. "anion." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "anion." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O13-anion.html

AILSA ALLABY and MICHAEL ALLABY. "anion." A Dictionary of Earth Sciences. 1999. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-anion.html

Learn more about citation styles

anion

The Oxford Pocket Dictionary of Current English | 2009 | Copyright

an·i·on / ˈanˌīən/ • n. Chem. a negatively charged ion, i.e., one that would be attracted to the anode in electrolysis. The opposite of cation. DERIVATIVES: an·i·on·ic / ˌanīˈänik/ adj.

Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"anion." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

"anion." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O999-anion.html

"anion." The Oxford Pocket Dictionary of Current English. 2009. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-anion.html

Learn more about citation styles

anion

The Concise Oxford Dictionary of English Etymology | 1996 | | Copyright

anion (electr.) ion with negative charge which moves towards the anode during electrolysis. XIX. — Gr. anión, f. ANA- + ION; cf. ANODE.
Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

T. F. HOAD. "anion." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

T. F. HOAD. "anion." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O27-anion.html

T. F. HOAD. "anion." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-anion.html

Learn more about citation styles

anion

A Dictionary of Biology | 2004 | Copyright

anion A negatively charged ion, such as the chloride ion (Cl–). Compare cation.
Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"anion." A Dictionary of Biology. 2004. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

"anion." A Dictionary of Biology. 2004. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O6-anion.html

"anion." A Dictionary of Biology. 2004. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-anion.html

Learn more about citation styles

anion

World Encyclopedia | 2005 | Copyright

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

Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"anion." World Encyclopedia. 2005. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

"anion." World Encyclopedia. 2005. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O142-anion.html

"anion." World Encyclopedia. 2005. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-anion.html

Learn more about citation styles

anion

A Dictionary of Plant Sciences | 1998 | | Copyright

anion An ion that carries a negative electrical charge.
Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

MICHAEL ALLABY. "anion." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "anion." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O7-anion.html

MICHAEL ALLABY. "anion." A Dictionary of Plant Sciences. 1998. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-anion.html

Learn more about citation styles

anion

A Dictionary of Food and Nutrition | 2005 | | Copyright

anion A negatively charged ion.
Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

DAVID A. BENDER. "anion." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

DAVID A. BENDER. "anion." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O39-anion.html

DAVID A. BENDER. "anion." A Dictionary of Food and Nutrition. 2005. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-anion.html

Learn more about citation styles

anion

Oxford Dictionary of Rhymes | 2007 | Copyright

anion •Brian, cyan, Gaian, Geminian, Hawaiian, ion, iron, Ixion, lion, Lyon, Mayan, Narayan, O'Brien, Orion, Paraguayan, prion, Ryan, scion, Uruguayan, Zion •andiron •gridiron, midiron •dandelion • anion • Bruneian •cation, flatiron •gowan, Palawan, rowen •anthozoan, bryozoan, Goan, hydrozoan, Minoan, protozoan, protozoon, rowan, Samoan, spermatozoon •Ohioan • Chicagoan • Virgoan •Idahoan •doyen, Illinoisan, Iroquoian •Ewan, Labuan, McEwan, McLuhan, Siouan •Saskatchewan • Papuan • Paduan •Nicaraguan • gargantuan •carbon, chlorofluorocarbon, graben, hydrocarbon, Laban, radiocarbon •ebon • Melbourne • Theban •gibbon, ribbon •Brisbane, Lisbon •Tyburn •auburn, Bourbon •Alban • Manitoban • Cuban •stubborn •Durban, exurban, suburban, turban, urban

Show all research tools

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"anion." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 6 Feb. 2012 <http://www.encyclopedia.com>.

"anion." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (February 6, 2012). http://www.encyclopedia.com/doc/1O233-anion.html

"anion." Oxford Dictionary of Rhymes. 2007. Retrieved February 06, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-anion.html

Learn more about citation styles

Free newspaper and magazine articles

Adjustable capacity anion exchangers and their application in ion...
Magazine article from: Chemistry and Industry; 9/16/2002
The recognition and sensing of anions by a novel phenanthroline-bridged diamide.
Magazine article from: Canadian Journal of Chemistry; 9/1/2006
Answering your questions; normal range for anion gap.(Tips from the clinical...
Magazine article from: Medical Laboratory Observer; 6/1/2007

Facts and information from other sites

anion images
anion. Wikimedia Commons (Public Domain)

Related topics