Elements Compounds and Elements

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen, oxygen, and gold.

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What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together. Examples include water (H2O) and carbon dioxide (CO2).

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Mixtures can be homogeneous or heterogeneous.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are evenly distributed and not easily distinguishable. An example is saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not evenly distributed and can be easily distinguished. An example is a salad.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties. Pure substances can be elements or compounds.

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What are the two types of pure substances?

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The two types of pure substances are elements and compounds.

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What is air classified as?

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Air is classified as a homogeneous mixture because its components are evenly mixed.

Front

What is the difference between an element and a compound?

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An element is a single type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

Front

Can a mixture be separated into its components?

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Yes, mixtures can be separated into their components by physical means, such as filtration or distillation.