character: John Dalton
topic: Atomic Theory and its Evolution
grade: 12
subject: Chemistry
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character: Democritus
topic: Early Concepts of Atoms
grade: 12
subject: Chemistry
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character: John Thomson
topic: Discovery of Electrons and the Plum Pudding Model
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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