character: Democritus
topic: Ideas about the atom
grade: 11
subject: Chemistry
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character: John Dalton
topic: Atomic Theory and Development
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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character: Niels Bohr
topic: Bohr Model of the Atom
grade: 11
subject: Chemistry
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