character: Mr. Johnson
topic: Transition Metals in Construction Materials
grade: 9
subject: Chemistry
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character: Mrs. Smith
topic: Corrosion Resistance of Metals
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Alloys and Their Applications in Construction
grade: 9
subject: Chemistry
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character: Ms. Patel
topic: The Role of Metals in Sustainable Building Practices
grade: 9
subject: Chemistry
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