character: Mr. Thompson
topic: Elements and Their Properties
grade: 9
subject: Chemistry
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character: Professor Adams
topic: Periodic Table and Element Classification
grade: 9
subject: Chemistry
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character: Ms. Chen
topic: Chemical Bonding and Element Properties
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Reactivity of Elements and Trends in the Periodic Table
grade: 9
subject: Chemistry
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