character: Ernest Rutherford
topic: Discovery of the Nucleus
grade: 4
subject: Reading
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character: Niels Bohr
topic: Bohr Model of the Atom
grade: 4
subject: Reading
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character: J.J. Thomson
topic: Discovery of Electrons
grade: 4
subject: Reading
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character: Marie Curie
topic: Radioactivity Studies
grade: 4
subject: Reading
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