Science Fair Project Encyclopedia
Valence (chemistry)
Valence is a scientific term in chemistry to describe electrons in the outermost orbital. Valence electrons are used by atoms in chemical reactions and are generally the most important factor in determining which reactions can and cannot take place, especially in covalent bonding. In the American periodic table, the number of valence electrons one neutral atom has corresponds to its A group number.
See also: Valency (lists valence numbers for certain atoms)
Last updated: 05-28-2005 14:15:56
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details