character: Ernest Rutherford
topic: Studies on Radioactivity
grade: 12
subject: Chemistry
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character: Marie Curie
topic: Discovery of Radium
grade: 12
subject: Chemistry
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character: Henri Becquerel
topic: Discovery of Radioactivity
grade: 12
subject: Chemistry
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character: Niels Bohr
topic: Bohr Model and Atomic Theory
grade: 12
subject: Chemistry
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