character: Ernest Rutherford
topic: Discovery of the Nucleus
grade: 12
subject: Physics
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character: Ernest Rutherford
topic: Contributions to Nuclear Decay
grade: 12
subject: Physics
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character: Henri Becquerel
topic: Discovery of Radioactivity
grade: 12
subject: Physics
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character: Niels Bohr
topic: Development of the Bohr Model
grade: 12
subject: Physics
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