CAPE Physics Unit 2 · 2019 · Paper 1 · Question Q38

In medicine, radioactive isotopes are often used as tracers to assist in locating blockages in the human body. Which of the following isotopes would be MOST suitable for such an application? \begin{tabular}{|c|c|c|} \hline \textbf{Isotope} & \textbf{Half-life} & \textbf{Radiation Emitted} \\ \hline (A) & 2 minutes & Beta \\ (B) & 4 hours & Alpha \\ (C) & 5 hours & Beta \\ (D) & 20 minutes & Alpha \\ \hline \end{tabular}

1. (A)Half-life: 2 minutes; Radiation Emitted: Beta
2. (B)Half-life: 4 hours; Radiation Emitted: Alpha
3. (C)Half-life: 5 hours; Radiation Emitted: Beta
4. (D)Half-life: 20 minutes; Radiation Emitted: Alpha