character: J.J. Thomson
topic: Discovery of the electron and its role in atomic theory
grade: 11
subject: Chemistry
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character: Ernest Rutherford
topic: Contribution to atomic theory and discovery of the nucleus
grade: 11
subject: Chemistry
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character: Niels Bohr
topic: Bohr model of the atom and electron orbits
grade: 11
subject: Chemistry
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character: James Chadwick
topic: Discovery of the neutron and its impact on atomic structure
grade: 11
subject: Chemistry
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