Good morning everyone,
The Chemistry teacher gave our class a question on a test that we'd honestly never touched on before. It was something like this: "Which of the metals reacts with H2O (gas)?", and the alternatives were: Sodium, Magnesium and Fluorine(despite it not being a metal).
Could you guys please, if you could, tell me what the right answer is, and also explain it a bit? It might be really easy and we've actually done something like this before, but I can't quite understand it.
Thank you in advance.