character: Mr. Ahmed Khan
topic: Atomic Structure
grade: 12
subject: Chemistry
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character: Mr. Ahmed Khan
topic: Crystalline Solids
grade: 12
subject: Chemistry
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character: Dr. Emily Smith
topic: Periodic Table and Atomic Theory
grade: 12
subject: Chemistry
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character: Ms. Laura Zhang
topic: Properties of Solids
grade: 12
subject: Chemistry
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