Which statement correctly describes the characteristics of radioactive decay?
The rate of decay can be increased by heating the substance to a high temperature.
Radioactive decay is a chemical reaction that can be catalyzed by enzymes.
It is impossible to predict the exact time at which a specific nucleus will decay.
The decay rate of a sample slows down when the sample is enclosed in a thick concrete container.
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.