Which of the following statements about radioactive decay is correct?
Heating a radioactive substance increases its rate of decay.
It is impossible to predict which individual nucleus in a sample will decay next.
Chemical reactions can change the half-life of a radioactive isotope.
The radioactive decay of a nucleus depends on how many other nuclei have already decayed.
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.