1.2 Elements, Compounds, and Mixtures

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

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What is a compound?

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A compound is a substance formed when two or more different elements chemically bond together in fixed proportions.

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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 happens when elements form a compound?

Back

Chemical bonds form between atoms of the elements.

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Is water (H2O) an element, compound, or mixture?

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Water (H2O) is a compound.

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What is the difference between a compound and a mixture?

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A compound has a fixed composition and properties, while a mixture can vary in composition and retains the properties of its individual components.

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Can a mixture be separated?

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Yes, mixtures can be separated by physical methods such as filtration, distillation, or evaporation.

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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 carbon dioxide (CO2) or sodium chloride (NaCl).

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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, or salad, which contains different vegetables.