Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

Fig. 10.1 illustrates a beam of radiation travelling in a vacuum, and the beam is made up of $\alpha$-particles, $\beta$-particles and $\gamma$-rays.
(a(i))[1]

On Fig. 10.1, indicate and label the paths through the magnetic field for: $\alpha$-particles (name this path $\alpha$).

(a(ii))[2]

On Fig. 10.1, indicate and label the paths through the magnetic field for: $\beta$-particles (name this path $\beta$).

(a(iii))[1]

On Fig. 10.1, indicate and label the paths through the magnetic field for: $\gamma$-rays (name this path $\gamma$).

(b)[2]

State two safety precautions that hospital staff follow when working with $\gamma$-ray sources.

(c(i))[1]

Use nuclide notation to represent this isotope of iodine.

(c(ii))[2]

Explain why this emission and this half-life make iodine-131 appropriate as a tracer in medical diagnosis.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: A path curving downwards in the magnetic field (labelled α)

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