Elements, Compounds, and Mixtures

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What is an element?

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An element is a pure substance that contains only one kind of atom and cannot be broken down into simpler substances.

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What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together in a fixed ratio.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are together in the same place, but their atoms are not chemically bonded.

Front

How can you classify a substance that contains only one type of atom?

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It is classified as an element.

Front

What distinguishes a compound from a mixture?

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A compound has a fixed composition and is chemically bonded, while a mixture has no fixed composition and the substances retain their individual properties.

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What is an example of an element?

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An example of an element is oxygen (O) or gold (Au).

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What is an example of a compound?

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An example of a compound is water (H2O) or carbon dioxide (CO2).

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What is an example of a mixture?

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An example of a mixture is air, which contains various gases like nitrogen, oxygen, and carbon dioxide.

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How can you identify a compound in a chemical formula?

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A compound is identified by its chemical formula, which shows the elements and the ratio of atoms, such as H2O for water.

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What happens to the properties of substances in a mixture?

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In a mixture, the individual properties of the substances remain unchanged.