Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

A radioactive nuclide has a half-life of 4.0 days, and a sample contains $9.6 \times 10^8$ atoms of that nuclide.
(a)[2]

Calculate the number of nuclide atoms left after 12 days.

(b)[2]

Calculate the detector count rate after 12 days.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “9.6 × 10⁸ ÷ 8” …

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