Answer the following question in short:
Is it possible for an element to have zero valency? if yes, what does this signify?

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Solution

Yes, an element can have zero valency. For example, inert gases like argon and helium have zero valency.
Valency represents the combining tendency of an element or radical.
The zero group elements have zero valency because their octet is complete. Thus, they are stable and do not lose or gain an electron.
As these gases are stable they are non-reactive in nature.

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