character: Dr. Chem
topic: Element Behaviors
grade: 9
subject: Chemistry
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character: Ionization Energy Expert
topic: Ionization Energy Trends
grade: 9
subject: Chemistry
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character: Periodic Table Guru
topic: Element Reactivity and Properties
grade: 9
subject: Chemistry
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character: Chemical Bonds Specialist
topic: How Ionization Energy Affects Bonding
grade: 9
subject: Chemistry
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