Chemistry definition test (chapter 2)

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Matter

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18 Terms
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Matter

the material of the universe

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Atom

the fundamental units of which elements are composed

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Compound

a substance made of two or more different elements joined together in a specific way

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Molecule

a collection of atoms bonded together that behave as a unit

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Element

a substance that cannot be decomposed into simpler substances by chemical or physical means; it consists of atoms all having the same atomic number

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Solid

one of three states of matter; it has a fixed shape and volume

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Liquid

one of three states of matter; fits the shape of its container

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Gas

one of three states of matter; a substance with no definite shape or volume

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Physical Property

a characteristic of a substance that does not involve changing to another substance

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Chemical Property

a characteristic that describes the ability of a substance to change to a different substance

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Physical Change

a physical change involves a change in one or more physical properties, but no change in composition

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Chemical Change

a chemical change transforms a substance into one or more new substances

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Mixture

a substance with variable composition

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Alloy

a mixture of elements that have metallic properties

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Pure Substance

a substance with a constant composition- a pure element or pure compound

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Homeogenous Mixture

a mixture that is the same throughout

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Solution

a homeogeneous mixture

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Heterogeneous Mixture

a mixture that has different properties in different regions of the mixture

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