Which statement about β−\beta^-β−-particles and α\alphaα-particles is correct?
β−\beta^-β−-particles are a form of electromagnetic radiation.
β−\beta^-β−-particles are more ionizing than α\alphaα-particles.
The emission of a β−\beta^-β−-particle increases the proton number of the nucleus.
α\alphaα-particles have a greater penetrating depth in air than β−\beta^-β−-particles.
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.