character: Ms. Periodic
topic: Periodic Table Trends
grade: 9
subject: Science
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character: Mr. Electron
topic: Atomic Radius Changes
grade: 9
subject: Science
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character: Dr. Charge
topic: Ionization Energy Trends
grade: 9
subject: Science
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character: Professor Reactivity
topic: Reactivity of Elements
grade: 9
subject: Science
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