Key learning objectives
Mock papers launch from 1 August 2026. New papers will be added regularly from this date.
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alevel · physics · Module 6: Particles & Medical Physics · All papers
Releases 1 August 2026
Ultimate and Lifetime users can create one saved set of 4 extended-response questions for this topic and mark answers with examiner-style feedback.
Examiner-style long-answer practice with automatic marking, improvement advice and ProofCoach tracking.
standard / hard
Write your answer first, then mark it.
Write your answer first, then mark it.
Radioactivity, Half-Life and Nuclear Physics - data from: iodine-131 monitored by a Geiger counter
Activity halves every 8 days, confirming the half-life of iodine-131 is T1/2 = 8 days. The exponential decay follows A = A0 e^(-lambda t), where lambda = ln2/T1/2 about 0.087 day-1.
Write your answer first, then mark it.
Write your answer first, then mark it.
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