Module 6 Organization of Living Things, Atoms to Macromolecules

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atom

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basic unit of matter

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nucleus

Back

The extremely small, positively charged, dense center of an atom that contains positively charged protons and neutral neutrons.

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electron

Back

negatively charged particle; located outside the atom nucleus

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element

Back

substance consisting entirely of one type of atom

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cohesion

Back

attraction between molecules of the same substance

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adhesion

Back

attraction between molecules of different substances; in plants, attraction between unlike molecules

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mixture

Back

material composed of two or more elements or compounds that are physically mixed together but not chemically combined

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solution

Back

mixture of two or more substances in which the molecules of the substances are evenly distributed

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solute

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substance dissolved in a solvent to make a solution

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solvent

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substance in which the solute is dissolved to make a solution