character: Ernest Rutherford
topic: Rutherford's gold foil experiment
grade: 11
subject: Chemistry
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character: Ernest Rutherford
topic: Discovery of the atomic nucleus
grade: 11
subject: Chemistry
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character: Henri Becquerel
topic: Radioactivity
grade: 11
subject: Chemistry
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character: Niels Bohr
topic: Bohr model of the atom
grade: 11
subject: Chemistry
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