Question

Which metal reacts with water and bums?

Answer 1

Hey Mate!!!

Sodium and Potassium reacts with the water

Answer 2

Regarding transition metals, iron oxidizes in eater over a long time, as everyone knows.

Now, the ones that react immediately and violently are the alkali metals: lithium, sodium, potassium, rubidium and caesium. 
All these explode and burst in flames when exposed to water: the reaction ocurring is that these elements are becoming hydroxides.