character: Mr. Zhang
topic: Introduction to Chemical Bonds
grade: 9
subject: Chemistry
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character: Ms. Lee
topic: Types of Chemical Bonds
grade: 9
subject: Chemistry
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character: Mr. Smith
topic: The Octet Rule in Bonding
grade: 9
subject: Chemistry
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character: Dr. Kim
topic: Polarity and Molecular Geometry
grade: 9
subject: Chemistry
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