Astatine - 85At: reactions of elements
Reaction of astatine with air
Reaction of astatine with water
Reaction of astatine with the halogens
Astatine, At2, reacts with bromine, Br2, or iodine, I2, to form the "interhalogen" species AtBr and AtI respectively. Both of these dissolve in carbon tetrachloride, CCl4.
At2 + Br2 → 2AtBr
At2 + I2 → 2AtI
Reaction of astatine with acids
Astatine dissolves in dilute nitric acid, HNO3, or dilute hydrochloric acid, HCl.