AS chemistry - Bond angles, and shapes of molecules and ions revision

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  • Created by: Heiwa
  • Created on: 29-10-12 13:59

Bond angles, and shapes of molecules and ions

  • Atoms can have lone pairs of electrons, or bonding pairs of electrons (or both) 
  • Lone pairs of electrons exert more repulsion than bonding pairs do, which results in a distortion of the shape of the molecule 
  • every LONE PAIR OF ELECTRONS, reduces the bond angle by 2.5 degrees
  • you may be wondering why lone pairs of electrons reduce the bond angle, well... there is an increased mutual repulsion from lone pairs of electrons, this forces the bonding pairs of electrons closer together. so the bond angle has been reduced :)
  • the repulsion from electrons in the atoms outer

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