character: Marie Curie
topic: Discovery of Radioactivity
grade: 11
subject: Chemistry
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character: Henri Becquerel
topic: Spontaneous Radioactivity
grade: 11
subject: Chemistry
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character: Ernest Rutherford
topic: Alpha and Beta Particles
grade: 11
subject: Chemistry
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character: Dmitri Mendeleev
topic: Periodic Table and Chemical Properties
grade: 11
subject: Chemistry
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