character: John Dalton
topic: Atomic Theory and Molecular Concepts
grade: 11
subject: Chemistry
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character: Democritus
topic: Early Ideas of Atomism
grade: 11
subject: Chemistry
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character: J.J. Thomson
topic: Discovery of the Electron
grade: 11
subject: Chemistry
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character: Ernest Rutherford
topic: Gold Foil Experiment and Atomic Structure
grade: 11
subject: Chemistry
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