Why are storage containers for radioactive materials often constructed with thick walls made of lead?
Lead absorbs highly penetrating radiation.
Lead decreases the half-life of the unstable isotopes.
Lead increases the rate of radioactive decay to make the source safe more quickly.
Lead repels radiation, keeping it safely trapped inside the nuclei.
42 exam-style questions on CIE IGCSE Physics 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.