- The electron pairs surrounding a central atom determine the shape of the molecule or ion
- The electron pairs repel one another so that they are arranged as far apart as possible
- The arrangement of electron pairs minimises repulsion and therefore holds the bonded atoms in a definite shape
- The greater the number of electron pairs, the smaller the bond angle
- Different number of electron pairs result in different shapes
A lone pair of electrons is slightly closer to the central atom, and occupies more space than a bonded pair. This results in a lone pair repelling more strongly than a bonding pair
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