character: Dr. Michael Chen
topic: Applications of Alkali Metals in Daily Life
grade: 9
subject: Chemistry
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character: Dr. Jane Smith
topic: The Role of Sodium in Food Preservation
grade: 9
subject: Chemistry
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character: Mr. Alex Johnson
topic: Lithium Ion Batteries and Their Impact
grade: 9
subject: Chemistry
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character: Ms. Sarah Lee
topic: Potassium and Its Uses in Agriculture
grade: 9
subject: Chemistry
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