The Lewis dot structure of ammonia, NH3, reveals that it has one lone pair of electrons and three bonds (each to a hydrogen) around the central nitrogen atom. According to VSEPR theory, what molecular shape will it have?

Question

i thought it was tetrahedral but its wrong. what and why is the answer.

Answer 1

There are two answers. The ELECTRONIC GEOMETRY is tetrahedral; the molecular geometry is trigonal pyramidal.
Look at the AB3E here.
http://chemlabs.uoregon.edu/GeneralResources/models/vsepr.html