Matter 1 review A

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What are chemical properties?

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Chemical properties can only be recognized when substances react or do not react chemically with one another.

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Is toasting bread a physical or chemical change?

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Toasting bread is a chemical change.

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What defines a pure substance?

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A pure substance is one that consists of only one type of particle, as shown in a model with multiple particles of the same substance.

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What does the particle model represent?

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The particle model can represent an element, which consists of only one type of atom.

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How is Substance A classified if it is a homogeneous mixture?

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Substance A is classified as a homogeneous mixture because it has a uniform composition throughout.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

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What is the difference between an element and a compound?

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An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

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What is a heterogeneous mixture?

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A heterogeneous mixture is one in which the components are not uniformly distributed and can be easily distinguished.