Shapes of Molecules

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Molecular Shape deppends on the number of electron pairs in the outer orbital. The electron-pair repulsion theory relates to shape of molecules.

  • electrons are negatively charged so each electron pair will repel the other pairs as much as they can
  • however different types of electron pairs affect how far they repel each other
  • the greatest angles are between lone pairs and this often means bonded pairs are reduced because they are pushed together by the lone pairs.
  • The order of angles are:

Lone pair:Lone pair Lone pair:Bonded pair Bonded pair:bonded pair

Shapes of Molecules:

Linear Molecules:- these molecules are is a straight line and have a bond angle of


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