Elements, Compounds and Mixtures

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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. It has unique properties different from the individual elements.

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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?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. The individual components are not distinguishable.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the individual components can be seen and are not uniformly distributed.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element. It consists of protons, neutrons, and electrons.

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What is a molecule?

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A molecule is a group of two or more atoms bonded together. It can be made up of the same or different elements.

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What is the difference between a compound and a mixture?

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A compound is a chemical combination of elements with a fixed ratio, while a mixture is a physical combination of substances that can vary in composition.

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What are the properties of a compound?

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Compounds have unique properties that are different from the properties of the individual elements that make them up.

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What is saltwater an example of?

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Saltwater is an example of a homogeneous mixture because the salt is evenly distributed throughout the water.