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Classifying matter according to composition June 16, 2011

Posted by FelixNloom in Chapter 3, Charts and diagrams, Definitions.

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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