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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 ScienceUtilizing the Scientific Literature
Scientific literature is central to the development of science as a whole. This module explains...
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Earth ScienceThe Nitrogen Cycle
This module provides an overview of the nitrogen cycle and the chemical changes that govern...
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