What elements does Francium react?

Francium is an alkali metal with a single valence electron in its outer shell. It is highly reactive due to the instability caused by the large size of its atoms and the low ionization energy needed to remove the valence electron. Francium readily reacts with elements such as water, halogens, and oxygen to form various compounds. Due to its extreme rarity and radioactivity, Francium's reactivity has been mostly studied through theoretical calculations and predictions rather than direct experimentation.