character: Max Planck
topic: Planck's Quantum Theory
grade: 11
subject: Chemistry
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character: Albert Einstein
topic: Photoelectric Effect
grade: 11
subject: Chemistry
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character: Niels Bohr
topic: Bohr's Model of the Atom
grade: 11
subject: Chemistry
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character: Louis de Broglie
topic: Wave-Particle Duality
grade: 11
subject: Chemistry
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