character: Ernest Rutherford
topic: Discovery of the nucleus and pioneering work in nuclear chemistry
grade: 9
subject: Chemistry
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character: Marie Curie
topic: Research on radium and its properties
grade: 9
subject: Chemistry
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character: Niels Bohr
topic: Development of the Bohr model of the atom following Rutherford's work
grade: 9
subject: Chemistry
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character: Hans Geiger
topic: Contribution to the study of radioactivity and the Geiger counter
grade: 9
subject: Chemistry
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