Topic 1 Vocabulary (Intro to Matter)

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Atom

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Basic unit of matter. Smallest particle of an element.

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Crystalline Solid

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A solid material in which atoms, ions, or molecules are arranged in a highly ordered, repeating pattern.

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Element

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A pure substance made of only one kind of atom. The simplest form of matter that cannot be broken down into other substances.

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Mass

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A measure of the amount of matter in an object.

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Matter

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Anything that takes up space and has mass.

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Molecule

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Two or more atoms joined together by chemical bonds.

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Chemical Formula

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Shows the elements in the compound and the ratio of atoms.

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Property

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An observable characteristic of a substance.

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Solid

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A form of matter that has a definite shape and volume. Particles are packed together in a fixed arrangement.

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Liquid

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A form of matter that has no definite shape but has a definite volume. Particles can move and slide past each other and fill the bottom of their container.