character: Dr. Patel
topic: Comparative Analysis of Metal Reactivity
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Metals and Their Properties
grade: 9
subject: Chemistry
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character: Mr. Lee
topic: Types of Chemical Reactions
grade: 9
subject: Chemistry
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character: Dr. Singh
topic: The Activity Series of Metals
grade: 9
subject: Chemistry
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