Which of the following statements correctly describes the decay of a specific nucleus in a radioactive sample?
It is a random process, meaning it is impossible to predict exactly when a particular nucleus will decay.
It is a predictable process, and the oldest nuclei in the sample will always decay first.
It is an outer-surface process, meaning only nuclei at the boundary of the sample can decay first.
It is a temperature-dependent process, meaning heating the sample will increase the individual decay probability of that nucleus.
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.