character: Dr. Wang
topic: Chemical Properties of Elements
grade: 12
subject: Chemistry
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character: Ms. Johnson
topic: Periodic Trends and Chemical Properties
grade: 12
subject: Chemistry
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character: Mr. Smith
topic: Reactivity of Metals and Nonmetals
grade: 12
subject: Chemistry
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character: Dr. Adams
topic: Understanding Atomic Radius and Electronegativity
grade: 12
subject: Chemistry
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