Bromine (₃₅Br) has two stable isotopes, ⁷⁹Br and ⁸¹Br, with nearly equal natural abundance, and 32 known artificial radioisotopes from ⁶⁸Br to ¹⁰¹Br, the most stable of which is ⁷⁷Br, with a half-life of 57.04 hours. This is followed by ⁸²Br at 35.282 hours and ⁷⁶Br at 16.2 hours; the most stable isomer is ^80mBr with the half-life of 4.4205 hours.

Like the radioactive isotopes of iodine,