character: Ernest Rutherford
topic: Further developments in radioactivity after Curie research
grade: 9
subject: Chemistry
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character: Marie Curie
topic: Curie's research on radioactivity
grade: 9
subject: Chemistry
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character: Henri Becquerel
topic: Discovery of radioactivity
grade: 9
subject: Chemistry
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character: James Chadwick
topic: Discovery of the neutron and its implications on radioactivity
grade: 9
subject: Chemistry
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