People can be harmed by radioactive sources through contamination or irradiation.
Compare the hazards of contamination and irradiation by alpha, beta and gamma sources.
Your answer should explain how the half-life of a source affects the precautions needed.
97 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity, covering 6.5.1 Uses of radioactivity, 6.5.2 Dangers of ionising radiation and precautions, 6.5.3 Half-life and radiation dangers, 6.5.4 Safety precautions for radiation exposure, and 6.5.5 Contamination and irradiation. Each one has a worked solution and a mark scheme showing where the marks go.