character: Niels Bohr
topic: Bohr Model of the Atom
grade: 9
subject: Science
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character: Electron
topic: Energy Levels in Bohr Model
grade: 9
subject: Science
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character: Photon
topic: Emission and Absorption Spectra
grade: 9
subject: Science
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character: Albert Einstein
topic: Quantum Theory and its Impact on Bohr's Work
grade: 9
subject: Science
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