Question

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

Explain.

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Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

the helium atom has 2 electrons in its valence shell which is the K shell. however the capacity of K shell is 2 electrons thus the helium atom is stable. thus it's valency is not 2