Ionic Bonding

  • ´╗┐There is a tendency for Metals to lose electrons and become positively charged .
  • Non-metals gain electrons and become negatively charged ions.
  • Non-metals and Metals bond to form an ion.This process is called Ionic Bonding.
  • Ions are held together by strong electrostatic attraction forces between the positive metal ions and the negative non-metal ions in a giant lattice structure.
  • external image Image546.gifhttp://www.docbrown.info/page04/4_72bond/Image546.gif
  • external image Aggron%2520Stonebreaker,%2520The%2520Ogre%2520Magi.jpghttp://4.bp.blogspot.com/_IbG5h3WbRDo/SbESJR5PxyI/AAAAAAAAAPc/W8XScBzxyyI/s400/Aggron%2520Stonebreaker,%2520The%2520Ogre%2520Magi.jpg
  • Something like this
  • Ionic Bonding is the transfer of electrons from metallic element to non-metal in order to achieve the stable electronic configuration of a noble gas.This results in the formation of positive cation and negative anion.
  • Ionic Compounds have HIGH mp/bp because a lot of energy is required to overcome the strong electrostatic attraction between the oppositely charged ions in the giant ionic lattice.
  • Compounds with ions that are doubly charged have higher mp/bp than those that are singly charged.EG:Magnesium Oxide and Sodium Chloride.More energy is required to overcome the stronger electrostatic attraction between MG2+ and O2- than that between Na+ and CL+ ions.Hence Magnesium Oxide has a higher mp/bp than Sodium Chloride.
  • Ionic compounds can conduct electricity in molten state and aqueous state due to the presence of mobile IONS.
  • When dissolved in water,ionic compounds ionizes to form mobile ions.
  • When melted,the heat energy supplied overcomes some of the electrostatic forces of attraction between oppositely charged ions and hence the ions become mobile.
  • In solid state,the ions are fixed in position by the strong electrostatic attraction between the oppositely charged ions,ABSENCE of mobile ions resulted in the ionic compound being a non-electrical conductor in solid state.
  • Ionic compounds are generally soluble in polar solvents. EG: H20 but not organic solvents)
  • Ionic compounds are brittle.When force is applied,Ions of the same charged are brought together and face electrostatic repulsion.
  • http://www.youtube.com/watch?v=QqjcCvzWwww<---------------------------------Video showing Ionic Bonding