character: Marie Curie
topic: Radioactivity and Its Trends in the Periodic Table
grade: 12
subject: Chemistry
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character: Henri Becquerel
topic: Discovery of Radioactivity
grade: 12
subject: Chemistry
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character: Ernest Rutherford
topic: Nuclear Model of the Atom
grade: 12
subject: Chemistry
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character: Glenn T. Seaborg
topic: Transuranium Elements and Their Trends
grade: 12
subject: Chemistry
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