character: Mr. Mark Johnson
topic: Chemical Bonding and Atomic Radius
grade: 12
subject: Chemistry
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character: Ms. Sarah Lee
topic: Intermolecular Forces and Bonding Types
grade: 12
subject: Chemistry
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character: Dr. Emily Chen
topic: Periodic Trends: Atomic Radius and Electronegativity
grade: 12
subject: Chemistry
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character: Mr. David Smith
topic: Valence Electrons and Chemical Bonding
grade: 12
subject: Chemistry
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