
Concept explainers
Interpretation:
The geometric structure of ammonia is to be drawn and the bond angle is to be written.
Concept introduction:
The structure of a molecule can be drawn using the VSEPR theory. The total number of bonding and nonbonding pairs of electrons tells about the geometry of the molecule.
The valence electrons are the electrons present in the outermost shell.

Answer to Problem 40A
The geometric structure is tetrahedral.
4 pairs of electrons are surrounding the nitrogen in ammonia.
The approximate bond angle of
Explanation of Solution
Lewis structure of
Structure shows in
Thus, 4 pairs of electrons are surrounding the nitrogen in ammonia.
A normal tetrahedral bond has a bond angle of
Thus, ammonia has a pyramidal shape due to the presence of a lone pair.
Chapter 12 Solutions
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