Question

shape of NH3 is very similar to

Answer 1

For example; four electron pairs are distributed in a tetrahedral shape. If these are all bond pairs the molecular geometry is tetrahedral (e.g. CH4). If there is one lone pair of electrons and three bond pairs the resulting molecular geometry is trigonal pyramidal (e.g. NH3).

Answer 2

The NH3 bond angles are 107 degrees because the hydrogen atoms are repelled by the lone pair of electrons on the Nitrogen atom. We know that as the hybridisation of NH3 is sp3, it's molecular shape is supposed to betetrahedral…. …the molecular shape of NH3 is trigonal pyramidal