character: Dmitri Mendeleev
topic: Periodic Table and Oxidation States
grade: 12
subject: Chemistry
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character: Dmitri Mendeleev
topic: Development of the Periodic Law
grade: 12
subject: Chemistry
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character: Transition Metals
topic: Common Oxidation States
grade: 12
subject: Chemistry
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character: Oxidation States in Compounds
topic: Determining Oxidation States
grade: 12
subject: Chemistry
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