ES - CI3.2 The Shapes of Molecules

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  • Created by: Gemma
  • Created on: 16-10-12 17:58

Electron Pair Repulsions

  • 109 degree angle arises if the molecule has a tetrahedral shape eg. methane



--- = bond on the plane of the paper
- - - = bond behind the plane of the paper
triangle = bond in front of the plane of the paper 

  • Groups of electrons in the outer shell repel one another and move as far apart as possible

Lone Pairs

  • Some molecules have


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