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Mixtures - purified by physical means • Compounds –...

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Mixtures, Substances, Compounds, and Elements Mixtures – combinations of two or more pure substances. Each substance retains its composition and properties in a mixture. A mixture may be homogeneous ( a solution) or heterogeneous Substances – any kind of matter, all samples of which have identical composition and identical physical and chemical properties. A substance cannot be further broken down or
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Unformatted text preview: purified by physical means • Compounds – substances that are composed of two or more elements in a definite ratio of mass. Compounds can be decomposed into elements by chemical changes • Elements – substances that cannot be decomposed into simpler substances by chemical reactions. Elements are the simplest forms of matter....
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