CAPE Physics Unit 2 · 2012 · Paper 1 · Question Q40

Radioactive lead, ^{211}_{82}\text{Pb} decays by two beta particles and one alpha particle. What is the resulting nuclide?

1. (A)^{203}_{82}\text{Pb}
2. (B)^{207}_{82}\text{Pb}
3. (C)^{207}_{84}\text{Po}
4. (D)^{211}_{84}\text{Po}