valency
原子價
va·len·cy /ˈvelənsɪ/ 名詞
價,效價,原子價
Val·en·cy n.; pl. Valencies Chem. (a) See Valence. (b) A unit of combining power; a so-called bond of affinity.
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valency
n 1: the phenomenon of forming chemical bonds
2: (biology) a relative capacity to unite or react or interact
as with antigens or a biological substrate [syn: valence]
3: (chemistry) a property of atoms or radicals; their combining
power given in terms of the number of hydrogen atoms (or
the equivalent) [syn: valence]