If Fluorine reacts strongly with a metal, what other elements react strongly with metals?

Question

I have about 7 exams to study for and this is one of the first tests. It would be awesome if you could answer these questions as well.

1.) If Na catches on fire when exposed to water, what other elements will react strongly with water?

2.) If Iron is reactively unreactive, what other elements will be unreactive?

Answer

1.) Elements that have similar characteristics to sodium. Save valence, electronegativity, etc. So elements like potassium. 

2.) Usually noble gases aren't reactive because they have stable octets which wont allow any other elements to bind, thus stable.

If Fluorine reacts strongly with a metal, what other elements react strongly with metals?

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