In a radioactive decay chain

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

Problem

In a radioactive decay chain, the initial nucleus is

{}_{90}^{232}\text{Th}

. At the end there are 6

\alpha

-particles and 4

\beta

-particles which are emitted. If the end nucleus is

{}_{Z}^{A}\text{X}

, A and Z are given by : (1)

A=208; Z=80

(2)

A=202; Z=80

(3)

A=208; Z=82

(4)

A=200; Z=81