1. 
   covalence
   [n] - valence characterized by the sharing of electrons in a chemical compound
   Found op http://www.webdictionary.co.uk/definition.php?query=covalence
   
   
2. 
   covalence
   covalency noun valence characterized by the sharing of electrons in a chemical compound; the number of pairs of electrons an atom can share
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=covalence
   
   
3. 
   covalence
   (ko-va´lәns) the number of electron pairs an atom can share with other atoms. one or more chemical bonds formed by sharing of electron pairs between atoms. adj., cova´lent., adj.
   Found op http://www.encyclo.co.uk/local/21001
   
   
4. 
   Covalence
   In chemistry, covalence is the combining of atoms by means of the sharing of electrons.
   Found op http://www.probertencyclopaedia.com/browse/GC.HTM
   
   
5. 
   covalence
   1) Covalency 2) Valence 3) Valency
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/covalence/1
   
   

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