Three types of nuclear radiation are α\alphaα-, β\betaβ-, and γ\gammaγ-radiation. Which row correctly identifies the least and the most penetrating of these three radiations?
least penetratingmost penetratingAαβBαγCγβDγα \begin{array}{|c|c|c|} \hline & \text{least penetrating} & \text{most penetrating} \\ \hline \textbf{A} & \alpha & \beta \\ \hline \textbf{B} & \alpha & \gamma \\ \hline \textbf{C} & \gamma & \beta \\ \hline \textbf{D} & \gamma & \alpha \\ \hline \end{array} ABCDleast penetratingααγγmost penetratingβγβαA
B
C
D
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.