character: Professor Smith
topic: Periodic Table: Groups and Periods Explained
grade: 9
subject: Chemistry
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character: Mr. Johnson
topic: Understanding Atomic Structure
grade: 9
subject: Chemistry
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character: Dr. Brown
topic: Chemical Bonds and Reactions
grade: 9
subject: Chemistry
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character: Ms. Taylor
topic: States of Matter and Phase Changes
grade: 9
subject: Chemistry
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