HELP with a heating magnesium lab?

I would just like to know why the magnesium chooses to react with oxygen and not the nitrogen in the air? or does it react with both, but more so with oxygen? there is no way of proving that it reacted with nitrogen in the lab because we did not add water to it and also, if someone would like to tell me what a... show more I would just like to know why the magnesium chooses to react with oxygen and not the nitrogen in the air? or does it react with both, but more so with oxygen? there is no way of proving that it reacted with nitrogen in the lab because we did not add water to it

and also, if someone would like to tell me what a teacher looks for in a conclusion for a lab, because i always seem to fail miserably when it comes to it haha. thanks!
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