Name an inert gas having two electrons as its valence electrons.

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Solution

Valency of Helium is 2
Helium is the only inert gas or noble gas which has only 2 electrons in its outermost shell.
Its electronic configuration is $2$ .
Hence it is in a duplet state. And its valency is also 2.
Therefore, Helium is an inert gas having two electrons in its valence shell.

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