It reacts violently to form (briefly) Francium Hydroxide. The Francium would then rapidly decay. See: Dave Consiglio's answer to What would happen in a reaction between Fluorine and Francium? for more info on that decay process. read more
Francium is a radioactive element that decays with a half life of about twenty minutes. It was the last element discovered which occurs naturally on earth. It is the largest of any element known, with a diameter at a whopping 2.7 Angstroms. read more
Learn what would happen if the element francium was dropped into water and why you never see this reaction in real life. Learn what would happen if the element francium was dropped into water and why you never see this reaction in real life. read more