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ChemistryThe Periodic Table of Elements I
The modern periodic table is based on Dmitri Mendeleev’s 1896 observations that chemical elements can...
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Process of ScienceScientific Controversy
Controversy isn't always a bad thing. It exists in every field of science and in...
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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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