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Home > Chemistry > Properties of substances > Ionic and covalent substances

Chemistry

Ionic and covalent substances

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If you have worked through Revision Bite "Conduction of electricity" you will have learned about electrical conductivity of elements and compounds.This Revision Bite will focus on some other important properties of ionic and covalent compounds.

Before you start

Before you go on with this section it would be useful to know the answers to these questions:

  • What kind of elements are found in covalent compounds?
  • What kinds of elements are found in ionic compounds?
  • Where would you find transition metals in the periodic table?

Glossary

To understand this section it would be helpful to know these words:

  • Ionic compounds are compounds made of charged particles (ions). The positive ions are formed by metals having lost one or more electrons. The negative ions are formed by non-metals gaining one or more extra electrons.

    Ionic compounds conduct electricity when molten or in aqueous solution.

  • Covalent compounds are usually made from non-metal elements which are joined by bonds where electrons are shared.

    Covalent compounds do not conduct electricity at all.

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