Chemistry Concepts

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chemistry

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The study of the composition, structure, and properties of matter and changes it undergoes.

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matter

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Anything that has mass and takes up space.

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element

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A pure substance made of only one kind of atom.

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molecule

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A neutral group of atoms that are held together by covalent bonds.

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compound

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A substance that is made from the atoms of two or more elements that are chemically bonded.

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mixture

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A blend of two or more kinds of matter, each of which retains its own identity and properties.

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physical property

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Characteristic that can be observed or measured without changing the identity of the substance.

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chemical property

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The ability of a substance to undergo a change that transforms it into a different substance.

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phase change

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Process in which a substance transitions from one state of matter (solid, liquid, gas, or plasma) to another due to change in temperature or pressure.

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physical change

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Change in a substance that doesn't involve a change in the identity of the substance.