Can you predict when a particular nucleus will decay, or only how a large sample behaves? Use a decay curve to estimate half-life and distinguish activity from measured count rate.
Pupils try “Model decay with coins”. Includes the editable PowerPoint, a 50-minute lesson plan and a printable pupil sheet with equipment, instructions, example evidence and worked teacher answers.
AQA GCSE physics for ages 14–16. Part of the atoms and radioactive decay sequence.
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