The mass 82 isotope of bromine (82Br) is radioactive and is used as a tracer to identify the origin and destination of individual atoms in chemical reactions and biological transformations. A sample of 1, 1, 2-tribromocyclohexane was prepared by adding 82Br ─ 82Br to ordinary (nonradioactive) 1-bromocyclohexene. How many of the bromine atoms in the 1, 1, 2-tribromocyclohexane produced are radioactive? Which ones are they?