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How do you calculate the valency of an e...

How do you calculate the valency of an element from its electronic configuration? 

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The electronic configuration of the given element is written and the number of electrons in the outermost shell i.e., the number of valence electrons is determined. If the number of valence electrons is less than or equal to 4, its valency = the number of valence electrons. If number of valence electrons > 4, then, valency=8-number of valence electrons.
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  1. How do you calculate the valency of an element from its electronic con...

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