Physics (AS & A Level) · Oct / Nov 2019 · Paper 13 · Question 39

A radioactive nucleus emits an α-particle or a β– particle, creating a product nucleus. Which decay could create the product nucleus stated?

1. Aradioactive nucleus 226/88 Ra, decay α, product nucleus 224/86 Rn
2. Bradioactive nucleus 238/92 U, decay α, product nucleus 242/94 Pu
3. Cradioactive nucleus 228/88 Ra, decay β–, product nucleus 228/87 Fr
4. Dradioactive nucleus 231/90 Th, decay β–, product nucleus 231/91 Pa

As printed in the paper