Question

what are noble gases

Answer 1

Noble Gases are those which are unreactive.
They are stable.
Also , they  have no need to lose or share electrons to become stable .
Noble gases has valency == zero

Examples :-
Helium , Neon , Argon etc ...

Answer 2

Heya,

Noble gases are the elements whose last shell in electronic configuration is completely filled.

They don't either lose or gain electrons.

They are very stable.

They have a valency of 0.

Hope it helps u...