character: Dmitri Mendeleev
topic: Periodic Table and Atomic Structure
grade: 12
subject: Chemistry
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character: John Dalton
topic: Early Atomic Theory and Development of Atomic Models
grade: 12
subject: Chemistry
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character: Niels Bohr
topic: Bohr Model of the Atom
grade: 12
subject: Chemistry
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character: Henry Moseley
topic: Atomic Number and Periodic Law
grade: 12
subject: Chemistry
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