Question

Helium Atom has 2 electrons in its valence she'll but it's valence Is not explain

Answer 1

because its outermost shell is completely filled...and is inert .... in the K shell the total elecrons that can be accomodated is 2 .......for helium the elctronic confrigution is = 2....hence it doesn't require to gain or loose any electron to become inert

Answer 2

As we know that no of electrons that can be accommodated in the first shell is only 2. Helium has 2 electron in its first that is its one and only shell. Its valency is not 2 because it has achieved the noble configuration and it need not to give and receive electrons. So its valency is not 2.

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