Measurement, Classification and Phases of Matter

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Element

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Consists of one type of atom.

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Compound

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two or more different elements chemically bonded together

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Pure substance

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Either an element or a compound. All the particles are identical

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Mixture

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Has more than one type of particle

Particles are not chemically bonded together, so it can be separated by physical means

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Homogeneous Mixture

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A mixture that has a uniform composition throughout. The different components are not visibly distinguishable.

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Heterogeneous Mixture

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A mixture where the components are not uniform and can be visibly distinguished.

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Solution

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A type of homogeneous mixture where one substance (solute) is dissolved in another (solvent).

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Alloy

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A homogeneous mixture of two or more metals, or a metal and a non-metal, where the components are not chemically bonded.

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Suspension

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A heterogeneous mixture in which solid particles are suspended in a liquid or gas and are large enough to settle out over time.

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Colloid

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Heterogeneous mixture in which medium sized particles are suspended in a liquid or gas. They do not settle out, and they scatter light. Fog is an example.