character: Mr. Johnson
topic: Introduction to Chemical Bonding
grade: 9
subject: Chemistry
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character: Mrs. Smith
topic: Types of Chemical Bonds
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Properties of Ionic Compounds
grade: 9
subject: Chemistry
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character: Ms. Davis
topic: Covalent Bonds and Molecules
grade: 9
subject: Chemistry
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