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Classifying matter according to composition June 16, 2011

Posted by FelixNloom in Chapter 3, Charts and diagrams, Definitions.
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Matter is anything that occupies space and has mass.

Pure substances are composed of one type of atom or molecule.

  • Elements cannot be broken down into simpler substances.
  • Compounds are composed of two or more elements in fixed definite proportions.

A mixture is composed of two or more different types of atoms or molecules combined in variable proportions.

  • A homogeneous mixture is a uniform mixture of different substances.
  • A heterogeneous mixture is a nonuniform mixture of different substances that remain distinct.

(Tro, 2009, p. 56-7)

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