Physics · IGCSE · Edexcel · Pearson Edexcel International GCSE (9–1) Physics (Linear) — 4PH1 · Specification point · 7.20 · Radioactivity and particles · Fission and fusion
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| Students should: |
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7.20 describe how a chain reaction can be set up if the neutrons produced by one fission strike other U-235 nuclei |