Question

is nitrogen an inert gas. If yes why?

Answer 1

Nitrogen N2 is inert gas bcoz the triple bond between two nitrogen atoms is very strong.  

Answer 2

No nitrogen is not an inert gas because Nitrogen is reactive - it forms many compounds such as ammonia, nitrates, it is a fundamental ingredient in all proteins. It even forms diatomic molecules N2 with itself. Not an inert gas.