Question: what happens when you put francium into water

Stephen Davitt answered on 18 Nov 2016:

Well Francium is an Alkali metal and when they react with water they have a pretty violent reaction, if you put Potassium or sodium into water you get flames and a little bang, Francium is significantly more reactive so I assume there would be a humongous bang but sadly it is very unstable and doesnt really exist in real life to do the experiment, but here is a video of the Alkali metals in water and a prediction of what Francium would be like