character: Niels Bohr
topic: Hydrogen Atom and Spectral Lines
grade: 9
subject: Chemistry
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character: Electron
topic: Energy Levels in the Hydrogen Atom
grade: 9
subject: Chemistry
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character: Photon
topic: Emission and Absorption of Spectral Lines
grade: 9
subject: Chemistry
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character: Quantum Mechanics
topic: Bohr's Model of the Atom
grade: 9
subject: Chemistry
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