Chemistry - Chemical Kinetics Question with Solution | TestHub

${\mathrm{}}_{89}\mathrm{A}{\mathrm{c}}^{231}$after emission of some$\mathrm{\alpha }$and$\mathrm{\beta }-$particles gives${\mathrm{}}_{82}\mathrm{P}{\mathrm{b}}^{207}$. The number of such$\mathrm{\alpha }$and$\mathrm{\beta }-$particles are respectively