The radioactive isotope polonium, 84210Po{}^{210}_{84}\text{Po}84210Po, is an alpha (α\alphaα) emitter.
During this radioactive decay, an isotope of lead, Pb\text{Pb}Pb, is produced.
How many neutrons does a nucleus of this isotope of lead contain?
122
124
126
128
120 exam-style questions on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one has a worked solution and a mark scheme showing where the marks go.