Y8CHEM - Glossary W2

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chemical bond

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An attractive force that holds two atoms together

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chemical formula

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A symbol that shows the chemical composition of a substance

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compound molecule

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A substance made up of two or more types of atom bonded together

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elemental molecule

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A molecule that is made of only one type of element.

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Heterogenous mixture

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Describes a mixture that can be separated into its parts, and the parts retain their original properties; the mixture is not blended evenly

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Homogenous mixture

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Describes a mixture of two or more substances that are evenly distributed and do not separate out easily

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mixture

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A combination of substances that can be physically separated

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molecule

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A group of atoms bonded together

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pure substance

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A single substance without anything mixed in