Ionic

• Ionic compounds


  Form giant ionic lattices
• Giant ionic lattice


  • Every positive ion is surrounded by negative ions
  • Every negative ion is surrounded by positive ions
  • Three-dimensional structure
• Electrostatic forces of attraction

  • Strong forces of attraction between positive and negative ions
  • Also called ionic bonds
  • Act in all directions
• Heating an ionic solid

  Particles vibrate with enough energy to break the electrostatic forces of attraction, causing the solid to melt
• Melting point of sodium chloride

  Around 800°C
• Ionic compounds


  • Cannot conduct electricity when solids
  • Can conduct electricity when melted or dissolved in water
• In ionic compounds, it is the ions that move and carry the electrical charge, not electrons