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ChemistryAtomic Theory III
The 20th century was a period rich in advancing our knowledge of quantum mechanics, shaping...
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ChemistryChemical Reactions
This modules explores the variety of chemical reactions by grouping them into general types. We...
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Earth ScienceOrigins of Plate Tectonic Theory
The theory of continental drift was the first step toward plate tectonic theory, which became...
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