character: Dr. Mark Lee
topic: Metallic Bonds
grade: 9
subject: Chemistry
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character: Professor Anna Smith
topic: Ionic and Covalent Bonds
grade: 9
subject: Chemistry
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character: Mr. John Doe
topic: Atomic Structure and Bonding
grade: 9
subject: Chemistry
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character: Dr. Emily Zhang
topic: Properties of Metals and Alloys
grade: 9
subject: Chemistry
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