Which statement correctly explains why thick lead containers are used to store radioactive isotopes that emit highly penetrating γ\gammaγ-radiation?
Lead absorbs the radiation, preventing it from escaping into the surroundings.
Lead decreases the half-life of the radioactive isotope.
Lead increases the half-life of the radioactive isotope.
Lead magnetic fields reflect the emitted radiation back to stabilize the isotope.
484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 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.