character: John Dalton
topic: Atomic Theory and Development
grade: 11
subject: Chemistry
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character: Democritus
topic: Early Ideas on Atoms
grade: 11
subject: Chemistry
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character: J.J. Thompson
topic: Discovery of Electrons
grade: 11
subject: Chemistry
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character: Ernest Rutherford
topic: Nuclear Model of the Atom
grade: 11
subject: Chemistry
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