Helium atom has 2 electrons in its valence shell but its valency is not 2, Explain.

AcademicChemistryNCERTClass 9

The helium atom(E.C =1s2) has 2 electrons in its valence shell but its valency is zero as it is a noble gas and does not form a chemical bond, its duplet is complete. 

raja
Updated on 10-Oct-2022 13:32:33

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