Is oxygen the only gas in the air which will combine with Mg

When magnesium is heated in air, it will form magnesium oxide AND some magnesium Nitride quite easily. So no, it isn't.

Thank you so much :)

Mg doesnot react with oxygen on its own
U have to react it
Means by heating or so

Well there r a couple of other metals that react with oxygen on their own means ,if air is there ,they tarnish,
They r :silver,aluminium ,mostly ferrous

This wasn't what the OP was asking... at all.

Oh yes am sorry chief

Apologies, I didn't mean to seem so rude. The points you raise are true.

It's just that the fact that it needs to be heated was mentioned in my original post, and the OP was looking for other gasses in air that react with Mg. - I feel the question was answered well and needed no further elaboration - and from his response I gather so did the OP.

Thanks capuchin
I will luk for it again