Physical Properties

  • Ionic compounds are made of charged particles called ions which form a giant lattice structure.
  • Ionic substances have high melting and boiling points due to the presence of strong electrostatic forces acting between the oppositely charged ions.
  • These forces act in all directions and a lot of energy is required to overcome them.
  • Ionic compounds are usually solid at room temperature and are non-volatile.
  • They are usually water soluble as both ionic compounds and water are polar substances.

Electrical Conductivity

  • Ionic compounds can conduct electricity in the molten state or in solution as they have ions that can move and carry charge.
  • They cannot conduct electricity in the solid state as the ions are in fixed positions within the lattice and are unable to move.

Molten ionic substances conduct electricity, IGCSE & GCSE Chemistry revision notes

Molten or aqueous particles move and conduct electricity but cannot in solid form

AQA GCSE Chemistry Notes

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Morgan Curtin Chemistry

Author: Morgan

Morgan’s passion for the Periodic Table begun on his 10th birthday when he received his first Chemistry set. After studying the subject at university he went on to become a fully fledged Chemistry teacher, and now works in an international school in Madrid! In his spare time he helps create our fantastic resources to help you ace your exams.