valency Meaning in the Cambridge English Dictionary
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Meaning of “valency” in the English Dictionary

"valency" in British English

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valencynoun [C]

uk   us   /ˈveɪ.lə (also valence ) specialized
a ​measurement that ​shows the ​number of hydrogenatoms that can ​combine with one ​atom of a ​particularchemicalelement to make a compound, used to ​describe how ​easily an ​element can ​connect in a ​chemical way with ​others: Zinc has a valency of 2.
(Definition of valency from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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