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Why is the molecule CH4 tetrahedral whereas NH3 is not?

By the VSEPR (Valence shell electron pairs repulsions) theory, even though there are four electron pairs on C and N, the presence of a lone pair of electrons on N increases the repulsions, meaning that the NH3 molecule is not tetrahedral but trigonal bipyramidal.

Answered by Paula L. • Chemistry tutor

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Why is the molecule CH4 tetrahedral whereas NH3 is not?

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