(Polar molecules, Non-polar molecules, etc.)
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Marsenne Cabral 1A wrote:Are all molecules with four bonding pairs tetrahedral? What makes the difference if they are not?
All molecules with four bonding pairs and no lone pairs are tetrahedral. But if there was a lone pair, then it would be a trigonal pyramid, and so on. If a molecule has more or less than four bonding pairs then it is no longer a tetrahedral.
The bonding pairs are what determine the naming of the shape of the molecule; hence, a molecule with four bonding pairs of electrons will always be tetrahedral. If a molecule has two bonding pairs and two lone pairs of electrons (which adds up to four regions of electron density), it is not a tetrahedral molecule even though it does have four electron regions. The lone pair regions of electrons do not contribute to the naming of the shape of the molecule.
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