character: Dr. Marie Curie
topic: Oxygen Atoms and Their Properties
grade: 9
subject: Chemistry
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character: Mr. Thompson
topic: Understanding Covalent Bonds
grade: 9
subject: Chemistry
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character: Ms. Rodriguez
topic: The Role of Oxygen in Biological Systems
grade: 9
subject: Chemistry
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character: Professor Adams
topic: Molecular Geometry and Covalent Bonding
grade: 9
subject: Chemistry
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