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Chemical compound | Definition, Examples, & Types | Britannica
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Chemical reaction | Definition, Equations, Examples, & Types
May 12, 2025 · A chemical reaction is a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either …
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Apr 24, 2025 · Most of the materials that occur on Earth, such as wood, coal, minerals, or air, are mixtures of many different and distinct chemical substances. Each pure chemical substance …
Periodic table | Definition, Elements, Groups, Charges, Trends,
May 10, 2025 · The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the …
Chemical element | Definition, Origins, Distribution, & Facts
Apr 29, 2025 · A chemical element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which …
Benzene | Definition, Discovery, Structure, Properties, & Uses
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