character: Ms. Thompson
topic: Radioactivity and Half-life
grade: 9
subject: Chemistry
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character: Dr. Richards
topic: Nuclear Chemistry Basics
grade: 9
subject: Chemistry
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character: Professor Green
topic: Applications of Half-life in Medicine
grade: 9
subject: Chemistry
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character: Lab Tech Sam
topic: Understanding Radioactive Decay
grade: 9
subject: Chemistry
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