Physics (AS & A Level) · May / June 2017 · Paper 13 · Question 37

A nucleus of uranium-238, $^{238}_{92}\text{U}$, decays in a series of steps to form a nucleus of lead-206, $^{206}_{82}\text{Pb}$, as shown. $^{238}_{92}\text{U} \rightarrow \ldots\ldots\ldots \rightarrow {}^{206}_{82}\text{Pb}$ An α-particle or a β⁻ particle is emitted during each step. What is the total number of β⁻ particles that are emitted?

1. A6
2. B8
3. C10
4. D16

As printed in the paper