A worker in a nuclear laboratory wears a protective overall.
Describe the difference between irradiation and radioactive contamination.
The overall becomes contaminated with atoms of a beta-emitting isotope that has a half-life of 30 years. Explain why this contamination is a serious hazard.
The worker's skin is checked and is found not to be contaminated. Explain why the worker's skin is not radioactive even though it has been irradiated.
40 exam-style questions on AQA GCSE Physics 4.2 Atoms and nuclear radiation, covering 4.2.1 Radioactive decay and nuclear radiation, 4.2.2 Nuclear equations, 4.2.3 Half-lives and the random nature of radioactive decay, and 4.2.4 Radioactive contamination. Each one has a worked solution and a mark scheme showing where the marks go.