Question

what is ment by noble gases ?

Answer 1

Any gaseous elements which is kept in the group 18 of the periodic table.They were not known for long because they are very inert,.i.e., they are very un-reactive.

Answer 2

1. Non - reacting gases which are found in air are called Noble gases.
2. They are found in minute quantity in air.
3. Example: Helium ,Neon.