character: Periodic Professor
topic: Exploring Trends in the Periodic Table
grade: 12
subject: Chemistry
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character: Dr. Elemental
topic: Understanding Atomic Radius Trends
grade: 12
subject: Chemistry
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character: Ms. Valence
topic: The Role of Electronegativity in Chemical Bonds
grade: 12
subject: Chemistry
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character: Mr. Dmitri
topic: History and Organization of the Periodic Table
grade: 12
subject: Chemistry
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