A nucleus of undergoes the following decay sequence: 1

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

A nucleus of

^{232}_{\,90}\mathrm{Th}

undergoes the following decay sequence: 1. One

\alpha

decay 2. Two consecutive

\beta^{-}

decays Which nucleus is produced at the end of this sequence? (a)

^{228}_{\,89}\mathrm{Ac}

(b)

^{228}_{\,90}\mathrm{Th}

(c)

^{226}_{\,90}\mathrm{Th}

(d)

^{228}_{\,86}\mathrm{Rn}