Question

what is duplet valency? ​

Answer 1

Valency means how many electrons a chemical species needs to complete duplet or octet rule. For example: Hydrogen atoms needs one more electron. So, their valency is 1. Helium's duplet is naturally complete. It needs no electrons so, it's valency is 0.

Answer 2

Explanation:

Helium's duplet is naturally complete. It needs no electrons so, it's valency is 0. Flourine has 7 electrons in it's outermost shell, it needs 1 electron to complete the octet rule so, it's valency is 1.

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