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Question

Why do helium, neon and argon have a zero valency?

Structure of the atom CBSE Class 9

CBSE, Class 9, Exam Idea, Science

July 2, 2024

Answer

Helium has two electrons in its energy shell, while argon and neon have 8 electrons in their valence shells. As these have maximum number of electrons in their valence shells, they do not have any tendency to combine with other elements. Hence, they have a valency equal to zero.

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