Physics (AS & A Level) · May / June 2024 · Paper 12 · Question 39

The unstable nuclide $^{218}_{84}\text{X}$ decays through a sequence of emissions of $\alpha$ and $\beta^-$ particles to form the stable nuclide $^{210}_{83}\text{Y}$. How many $\alpha$ and $\beta^-$ particles are emitted during this decay process?

1. A1 $\alpha$-particle, 1 $\beta^-$ particle
2. B2 $\alpha$-particles, 1 $\beta^-$ particle
3. C2 $\alpha$-particles, 3 $\beta^-$ particles
4. D3 $\alpha$-particles, 2 $\beta^-$ particles

As printed in the paper