CAPE Physics Unit 2 · 2015 · Paper 1 · Question Q39

Which of the following equations represents the radioactive disintegration of Polonium-210 by \alpha-emission to a stable isotope of lead?

1. (A)^{210}_{84}\text{Po} \rightarrow \,^4_2\alpha + \,^{206}_{84}\text{Pb}
2. (B)^{210}_{84}\text{Po} \rightarrow \,^{210}_{82}\text{Pb} + \,^4_2\alpha
3. (C)^{210}_{84}\text{Po} \rightarrow \,^4_2\alpha + \,^{206}_{82}\text{Pb}
4. (D)^{210}_{84}\text{Po} \rightarrow \,^4_0\alpha + \,^{206}_{82}\text{Pb}