ionic compounds

• what structure do ionic compounds have?


  giant ionic lattice, closely packed arrangement
• how is the lattice attracted?

  strong electrostatic forces of attraction between oppositely charged ions in all directions of the lattice
• what two ways can the lattice be represented?

  3D model and ball and stick model

  
• adv and disad of the 3D model?

  adv-shows relative size of the ions and regular pattern of ionic crystal

  disad-only let’s you see outer layer of compound
• adv and disad of the ball and stick model?

  adv-shows regular pattern of ionic crystal, shows how all ions are arranged, suggets crystal extends beyond whats shown in diagram

  disad-model isn’t to scale so relative size of ions may not be shown, in reality there aren’t gaps between the ions
• ionic compounds have similar properties what are they and why?

  -high melting and boiling point, strong bonds take lots of energy to break

  -can’t conduct when solid but can as liquid, ions are held in place when solid whereas when liquid compound is melted and ions are free to move and carry electric charge around the structure