character: Henry Moseley
topic: Atomic Number and the Modern Periodic Table
grade: 9
subject: Chemistry
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character: Dmitri Mendeleev
topic: Development of the Periodic Table
grade: 9
subject: Chemistry
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character: John Dalton
topic: Atomic Theory and Early Models of Matter
grade: 9
subject: Chemistry
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character: Niels Bohr
topic: Bohr Model of the Atom
grade: 9
subject: Chemistry
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