A radioactive isotope decays as
`._(Z)A^(m) rarr ._(Z-2)B^(m-4) rarr ._(Z-1)C^(m-4)`
The half lives of `A` and `B` are 6 months respectively. Assuming that initially only `A` was present, will it be possibel to achieeve radioactive equilibrium fo `B`? If so, what would be the ratio ot `A` and `B`? If so, what would happen if the half-lives for `A` and `B` were 10 months adn 6 months respectively?
