character: Marie Curie
topic: Discovery of Radioactive Elements
grade: 9
subject: Chemistry
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character: Henri Becquerel
topic: Discovery of Radioactivity
grade: 9
subject: Chemistry
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character: Ernest Rutherford
topic: Properties of Radioactive Elements
grade: 9
subject: Chemistry
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character: Lise Meitner
topic: Nuclear Fission and its Relation to Radioactivity
grade: 9
subject: Chemistry
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