character: Professor Proton
topic: Understanding the Types of Compounds
grade: 3
subject: Science
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character: Professor Proton
topic: Exploring Chemical Reactions
grade: 3
subject: Science
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character: Professor Proton
topic: Basic Elements and Their Compounds
grade: 3
subject: Science
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character: Professor Proton
topic: What are Mixtures and Solutions?
grade: 3
subject: Science
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