A Compound is a ______ substance made up of ______

A compound is a pure substance made up of two or more elements.

Properties of pure substances

  • A substance with a fixed chemical composition is called a pure substance, such as water, air, and nitrogen.
  • A pure substance does not have to be of a single element or compound.
  • A pure substance may exist in different phases. There are three principal phases solid, liquid, and gas.
  • Pure substances have a sharply defined (one temperature) melting or boiling point. Impure substances have a temperature range over which they melt or boil.

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