Physics (AS & A Level) · May / June 2016 · Paper 13 · Question 39

Radon $^{222}_{86}\text{Rn}$ is the start of a decay chain that forms bismuth $^{214}_{83}\text{Bi}$ by α and β⁻ emission. For the decay of each nucleus of radon, how many α particles and β⁻ particles are emitted?

1. Aα particles: 1, β⁻ particles: 1
2. Bα particles: 2, β⁻ particles: 1
3. Cα particles: 1, β⁻ particles: 2
4. Dα particles: 2, β⁻ particles: 2

As printed in the paper