Basic Chemistry Concepts

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Matter

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Anything that has mass and takes up space.

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Pure Substance

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A material with a constant composition and consistent properties throughout.

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Mixture

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A combination of two or more substances where each retains its own properties.

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Metal

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An element that is typically hard, shiny, and has good electrical and thermal conductivity.

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Nonmetal

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An element that lacks the characteristics of a metal and is usually brittle, not shiny, and a poor conductor.

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Metalloid

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An element with properties intermediate between metals and nonmetals.

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Physical Property

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A characteristic of a substance that can be observed or measured without changing its identity.

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Density

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The mass per unit volume of a substance.

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Alloy

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A mixture of two or more metals, or a metal and another element, that has metallic properties.

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Compound

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A substance formed when two or more chemical elements are chemically bonded together.