character: John Dalton
topic: Atomic Theory and Its Influence on Chemical Discoveries
grade: 9
subject: Chemistry
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character: Democritus
topic: Early Concepts of Atoms
grade: 9
subject: Chemistry
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character: J.J. Thomson
topic: Discovery of the Electron and Atomic Models
grade: 9
subject: Chemistry
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character: Ernest Rutherford
topic: Gold Foil Experiment and Nuclear Model of the Atom
grade: 9
subject: Chemistry
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