Compounds, Elements and Mixtures

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What are compounds?

Back

Substances formed when two or more different kinds of atoms chemically combine.

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What is an element?

Back

A pure substance that contains only one kind of atom.

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What is a mixture?

Back

A combination of two or more substances that are not chemically combined.

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition throughout, such as saltwater.

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What is a heterogeneous mixture?

Back

A mixture that consists of visibly different substances or phases, such as a salad.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed from two or more elements chemically bonded, while a mixture is a physical combination of substances.

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What is an example of a compound?

Back

Water (H2O), which is made of hydrogen and oxygen atoms.

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What is an example of an element?

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Oxygen (O), which consists of only oxygen atoms.

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What is an example of a heterogeneous mixture?

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A pizza, which contains different ingredients that can be seen and separated.

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What is an example of a homogeneous mixture?

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Vinegar, which has a consistent composition throughout.