Physics (AS & A Level) · May / June 2026 · Paper 12 · Question 40

A nucleus decays in a series of stages. At each stage, an α-particle or β– particle is emitted. Which sequence of emitted particles forms a nucleus that is an isotope of the original nucleus?

1. Aα, α, β–, β–
2. Bβ–, β–, α
3. Cα, α, α, α
4. Dβ–, β–, β–

As printed in the paper