character: Dr. Sheldon Cooper
topic: Periodic Table Trends
grade: 12
subject: Chemistry
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character: Dr. Sheldon Cooper
topic: Chemical Bonding
grade: 12
subject: Chemistry
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character: Dr. Sheldon Cooper
topic: Atomic Structure
grade: 12
subject: Chemistry
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character: Dr. Sheldon Cooper
topic: Periodic Trends in Reactivity
grade: 12
subject: Chemistry
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