Why do Helium,Neon and Argon have a zero vale | vedclass

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(B) Helium has $2$ electrons in its only energy shell (duplet),while Neon and Argon have $8$ electrons in their valence shells (octet).Since these ele

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They have a stable electronic configuration with a completely filled valence shell.

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(B) Helium has $2$ electrons in its only energy shell (duplet),while Neon and Argon have $8$ electrons in their valence shells (octet).Since these elements have the maximum number of electrons in their outermost shells,their valence shells are completely filled.This stable electronic configuration means they have no tendency to gain,lose,or share electrons with other elements.Therefore,their combining capacity,or valency,is equal to $0$.

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

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