Examiner Challenge Test — GCSE Physics Atomic Structure & Radioactivity

Most students revise by reading notes. This is different. Twenty-three exam-style answers, each with exactly the kind of mistake chief examiners flag most often — your job is to spot it, explain why it drops marks, and rewrite it correctly. Covers nuclear notation, isotopes, alpha/beta/gamma properties, nuclear equations, half-life, activity (Bq), irradiation vs contamination, and background radiation. Full mark scheme included: the mistake, why it loses marks, the correct answer, and a Grade 9 model answer. Built from real examiner reports.

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