character: Periodic Table Guide
topic: Overview of Interactive Periodic Table Features
grade: 9
subject: Chemistry
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character: Chemical Elements
topic: Properties and Characteristics of Elements
grade: 9
subject: Chemistry
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character: Periodic Trends
topic: Understanding Atomic Radius, Electronegativity, and Ionization Energy
grade: 9
subject: Chemistry
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character: Element Classification
topic: Metals, Nonmetals, and Metalloids in the Periodic Table
grade: 9
subject: Chemistry
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