A pure substance is made up of same kinds of molecules, elements and compounds are the basic examples of such matter, whereas mixture is made up of two different kinds of molecules, homogeneous mixtures, and heterogeneous mixtures are the major types of mixtures.
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Explanation:
A pure substance is made up of same kinds of molecules, elements and compounds are the basic examples of such matter, whereas mixture is made up of two different kinds of molecules, homogeneous mixtures, and heterogeneous mixtures are the major types of mixtures.