Question

why do inert gases not combine with other elements​

Answer 1

Explanation:

At the top of the noble gases is little helium (He), with a shell that is full with only two electrons. The fact that their outer shells are full means they are quite happy and don't need to react with other elements. In fact, they rarely combine with other elements. That non-reactivity is why they are called inert.

Answer 2

Inert gases are themselves with zero valency so they do not combine with other elements to form compounds. Eg. Helium, argon etc.

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