Radioactive materials can emit α\alphaα, β\betaβ, and γ\gammaγ-radiations.
Which statement about these radiations is correct?
γ\gammaγ-radiation is electromagnetic radiation and has the greatest penetrating power.
α\alphaα-radiation consists of helium nuclei and has the lowest ionizing power.
β\betaβ-radiation consists of uncharged particles and is more penetrating than γ\gammaγ-radiation.
γ\gammaγ-radiation consists of charged particles and has the lowest penetrating power.
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.