Question

why He Ne and are called inert ​

Answer 1

Answer:

He, Ne are called inert gases because their outermost shell is complete and they do not lose or gain electrons in their outermost shell, hence they have zero valency.

Answer 2

Answer:

Helium and Neon are called Inert gases because their outer most electrons are completely filled ...and they can't react with other elements in order to gain or lose electrons. .