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character: Nucleus
topic: Nucleus Structure and Composition
grade: 9
subject: Chemistry
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character: Proton
topic: Properties of Protons
grade: 9
subject: Chemistry
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character: Neutron
topic: Properties of Neutrons
grade: 9
subject: Chemistry
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character: Atomic Mass
topic: Calculating Atomic Mass from Protons and Neutrons
grade: 9
subject: Chemistry
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