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Chemical compound | Definition, Examples, & Types | Britannica
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Chemical compound | Definition, Examples, & Types | Britannica
Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements. All the matter in the universe is composed of the atoms of more …
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
May 9, 2025 · chemical bonding in benzene Benzene is the smallest of the organic aromatic hydrocarbons. It contains sigma bonds (represented by lines) and regions of high-pi electron …
Sodium hydroxide | Definition, Common Name, & Uses | Britannica
Chemical Safety Facts - Sodium Hydroxide; The Essential Chemical Industry - online - Sodium hydroxide
Reaction rate | Facts & Formula | Britannica
reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a …
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May 15, 2025 · Nitrous oxide, also called laughing gas, one of several oxides of nitrogen, a colorless gas with pleasant, sweetish odor and taste, which when inhaled produces …
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