Question

why oxygen doesn't itself burn?

Answer 1

A fire requires three things: oxygen, fuel and heat. On the surface, one might think that the answer is that there's no fuel present, but that's actually not quite true. Nitrogen can, in fact, burn under the right conditions. The thing it, it's really hard to burn. Nitrogen is triple-bonded, which means it doesn't react easily. If you heat up the atmosphere enough, it will burn, but it won't produce enough heat to keep the reaction going. 

hope it helps...

Answer 2

beacuse to something reaction requires fuel and an oxidizer like oxygen.
Also it is not flammable but it is a high energy gas..





i think its right