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Applying VSEPR theory

For some reason many students seem to find it very difficult to predict the shape and bond angles of a simple molecule or ion using Valence Shell Electron Pair Repulsion Theory (VSEPR). At first sight this seems strange because the theory really is very simple. Essentially there are only three basic ideas:Applying the first idea leads to the fact that there are only five basic shapes to be considered. In fact there are...

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