Final answer:
A molecule of ammonia (NH₃) has three covalent bonds, with the central nitrogen atom forming three single bonds with three hydrogen atoms.
Step-by-step explanation:
The molecule of ammonia (NH₃) consists of one nitrogen atom and three hydrogen atoms. These atoms are held together by covalent bonds. In ammonia, the central nitrogen atom has five valence electrons, three of which are unpaired and capable of forming covalent bonds by sharing electrons with hydrogen atoms. According to its Lewis electron structure, nitrogen forms three single covalent bonds with hydrogen atoms and also has one lone pair. Thus, there are a total of three covalent bonds in a molecule of ammonia.