character: Mr. Alan Smith
topic: Periodic Trends: Atomic Radius and Electronegativity
grade: 12
subject: Chemistry
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character: Dr. Emily Johnson
topic: Understanding Ionic and Covalent Bonds
grade: 12
subject: Chemistry
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character: Ms. Sarah Lee
topic: The Periodic Table and Its Trends
grade: 12
subject: Chemistry
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character: Mr. David Brown
topic: Metallic Character and Periodic Trends
grade: 12
subject: Chemistry
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