character: Henri Becquerel
topic: Spontaneous Radioactivity
grade: 11
subject: Chemistry
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character: Marie Curie
topic: Radioactivity Research
grade: 11
subject: Chemistry
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character: Ernest Rutherford
topic: Nuclear Chemistry
grade: 11
subject: Chemistry
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character: James Chadwick
topic: Discovery of Neutrons
grade: 11
subject: Chemistry
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