Which row in the table correctly identifies the relative charge (in units of elementary charge eee) of alpha (α\alphaα), beta-minus (β−\beta^-β−), and gamma (γ\gammaγ) radiation?
Alpha (α)Beta-minus (β−)Gamma (γ)A+2−10B+20−1C−2+10D0−1+2 \begin{array}{c|c|c|c} \hline & \text{Alpha } (\alpha) & \text{Beta-minus } (\beta^-) & \text{Gamma } (\gamma) \\ \hline \text{A} & +2 & -1 & 0 \\ \text{B} & +2 & 0 & -1 \\ \text{C} & -2 & +1 & 0 \\ \text{D} & 0 & -1 & +2 \\ \hline \end{array} ABCDAlpha (α)+2+2−20Beta-minus (β−)−10+1−1Gamma (γ)0−10+2Row A
Row B
Row C
Row 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.