Ammonia NIST Chemistry WebBook
Lewis dot arrangement in the case of NH3 is portrayed by the outer electrons surrounding the nitrogen atom. The Lewis dot arrangement in the case of NH3 exhibits that the N atom connects one pair of electrons with each of the three hydrogen atoms, resulting in a total of 3 connected pairs of electrons. The ammonia molecule takes a trigonal pyramidal structure attributed to the distribution of the outer electrons according to its Electron pair dot structure. In the Lewis dotpoint representation of ammonia, the N atom is enclosed by three points, each representing a pair of united electrons with a H atom.