character: Pierre Curie
topic: Contribution to radioactivity studies
grade: 9
subject: Physics
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character: Marie Curie
topic: Discovery of radium and polonium
grade: 9
subject: Physics
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character: Henri Becquerel
topic: Discovery of radioactivity
grade: 9
subject: Physics
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character: Ernest Rutherford
topic: Further developments in nuclear physics and radioactivity
grade: 9
subject: Physics
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