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When the number of the valence electrons...

When the number of the valence electrons in an element 'x' is 4 or more than 4, does '(8-x)' matches with the valency of that element ? How many electrons are used to complete the octet ?

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When the number of the valence electrons in an element .x. is 4 or more than 4, does .(8-x). matches with the valency of that element .(8-x) electrons are used to complete the octet
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