character: Ms. Lee
topic: Introduction to Elements and Compounds
grade: 9
subject: Chemistry
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character: Mr. Smith
topic: Atomic Structure and Elements
grade: 9
subject: Chemistry
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character: Dr. Johnson
topic: Compounds and Their Properties
grade: 9
subject: Chemistry
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character: Ms. Chang
topic: Periodic Table and Chemical Bonds
grade: 9
subject: Chemistry
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