The structure of external most shell of inert gases in

Valency of inert gases is

The inert gases are

Which one of the following shows the correct electronic configuration of the outermost shell in inert gases ?

Which one of the following shows the correct electronic configuration of the outermost shell in inert gases ?

The outermost shell of the elements of inert gases is characterised by

Give reason of inert gases

Sources of inert gases are