character: Julius Lothar Meyer
topic: Atomic Volume and Periodicity
grade: 12
subject: Chemistry
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character: Dmitri Mendeleev
topic: Periodic Table and Element Classification
grade: 12
subject: Chemistry
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character: John Dalton
topic: Atomic Theory and Molecular Compounds
grade: 12
subject: Chemistry
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character: Linus Pauling
topic: Electronegativity and Chemical Bonding
grade: 12
subject: Chemistry
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