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Why do Helium, Neon and Argon have a zero valency? - Science

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Question

Why do Helium, Neon and Argon have a zero valency?

Short Note

Solution

Helium has only K shell and it is completely filled with 2 electrons. Argon and neon have 8 electrons in their outermost shell which is the maximum number of electrons that can be accommodated in the outermost shell, hence their valency is zero.

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Chapter 4: Structure of the Atom - Long Answer Questions [Page 32]

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NCERT Exemplar Science [English] Class 9
Chapter 4 Structure of the Atom
Long Answer Questions | Q 36. | Page 32
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