In chemistry, an electron pair or a Lewis pair consists of two electrons that occupy the same orbital but have opposite spins. The electron pair concept was introduced in a 1916 paper of Gilbert N. Lewis. Because electrons are fermions, the Pauli exclusion principle forbids these particles from having exactly the same quantum numbers. Therefore th...
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http://en.wikipedia.org/wiki/Electron_pair
Two electrons within one orbital with opposite spins responsible for a chemical bond. See also lone pair.
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http://www.chemicalglossary.net/definition/680-Electron_Pair
Two electrons within one orbital with opposite spins responsible for a chemical bond. See also lone pair.
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http://www.encyclo.co.uk/visitor-contributions.php
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