Pure Substance and Mixture Review

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What is a pure substance?

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A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

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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 or heterogeneous.

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What is matter?

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Matter is anything that has mass and occupies space.

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What are elements?

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Elements are pure substances that cannot be broken down into simpler substances by chemical means. They consist of only one type of atom.

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What are compounds?

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Compounds are substances formed when two or more different types of atoms bond together chemically.

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What is the difference between an element and a compound?

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An element is a pure substance made up of only one type of atom, while a compound is made up of two or more different types of atoms chemically bonded together.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition and appearance throughout. Examples include saltwater and air.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture that does not have a uniform composition and can have visibly different substances. Examples include salad and sand.

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What are molecules?

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Molecules are groups of two or more atoms bonded together. They can be made up of the same or different types of atoms.

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What are atoms?

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Atoms are the basic building blocks of matter and the smallest unit of an element that retains its properties.