Question

What do you mean by Noble gas ?

Answer 1

Noble gas is group of gases which does not react with other chemicals .Helium ,neon argon xenon are some examples of noble gas

Answer 2

Hey mate !!

Noble gases are the group of 6 elements that don't combine with other elements

                               Or

The elements which are not reactive

                                Or

The elements which don't have valance electrons in their outermost shell

Hope it helps you ^_^