character: Dr. Marie Curie
topic: Understanding Element Organization in the Periodic Table
grade: 12
subject: Chemistry
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character: Dmitri Mendeleev
topic: Development of the Periodic Law
grade: 12
subject: Chemistry
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character: John Dalton
topic: Early Theories of Atomic Structure
grade: 12
subject: Chemistry
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character: Niels Bohr
topic: Bohr Model and Electron Arrangement
grade: 12
subject: Chemistry
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