character: Niels Bohr
topic: Model of the atom and neutron's role
grade: 12
subject: Physics
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character: Ernest Rutherford
topic: Nuclear model of the atom
grade: 12
subject: Physics
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character: James Chadwick
topic: Discovery of the neutron
grade: 12
subject: Physics
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character: Albert Einstein
topic: Mass-energy equivalence and atomic structure
grade: 12
subject: Physics
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