character: Dr. Lee
topic: Introduction to Chemical Bonding
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Ionic and Covalent Bonds
grade: 9
subject: Chemistry
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character: Mr. Smith
topic: Molecular Shapes and Bond Angles
grade: 9
subject: Chemistry
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character: Dr. Chen
topic: Electronegativity and Polarity
grade: 9
subject: Chemistry
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