Element, Compound, Mixture

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What is an element?

Back

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?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. For example, water (H2O) is a compound made of hydrogen and oxygen.

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What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Each substance retains its own properties.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture in which the components are evenly distributed and the mixture looks the same throughout. Example: sweet tea.

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What is a heterogeneous mixture?

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

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What is a molecule?

Back

A molecule is the smallest unit of a chemical compound that retains its chemical properties, formed when two or more atoms bond together.

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What is the difference between an element and a compound?

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

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What is an example of a compound?

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Carbon dioxide (CO2) is an example of a compound, as it is made of carbon and oxygen atoms bonded together.

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What is an example of an element?

Back

Oxygen (O) is an example of an element, as it consists of only oxygen atoms.

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What is an example of a homogeneous mixture?

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Saltwater is an example of a homogeneous mixture, as the salt is evenly dissolved in the water.