character: John Dalton
topic: Atomic Theory: Foundations of Modern Chemistry
grade: 12
subject: Chemistry
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character: Democritus
topic: Early Atomic Concepts
grade: 12
subject: Chemistry
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character: J.J. Thomson
topic: Discovery of the Electron
grade: 12
subject: Chemistry
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character: Ernest Rutherford
topic: Nuclear Model of the Atom
grade: 12
subject: Chemistry
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