Element, compound, or mixture

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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. Examples include hydrogen (H), oxygen (O), and gold (Au).

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What is a compound?

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A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and sodium chloride (NaCl).

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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. Mixtures can be homogeneous (uniform composition) or heterogeneous (distinct components).

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture in which the composition is uniform throughout. An example is saltwater.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture in which the composition is not uniform throughout. An example is a salad.

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What is the chemical formula for water?

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The chemical formula for water is H2O.

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What is the chemical formula for sodium chloride?

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The chemical formula for sodium chloride is NaCl.

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What is magnesium chloride?

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Magnesium chloride is a compound with the chemical formula MgCl2.

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What is the difference between a compound and a mixture?

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A compound is made of two or more elements chemically bonded, while a mixture is a physical combination of substances that can be separated by physical means.

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What is an example of an element?

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An example of an element is carbon (C).