Electron pair dot arrangement for NH3 is shown by the outer electrons surrounding the nitrogen atom. The dot dot structure in the case of NH3 exhibits that the N atom joins 1 pair of electrons with each of the three H atoms, resulting in a total of a trio shared pairs of electrons. The ammonia molecule adopts a trigonal pyramidal shape attributed to the distribution of the outer electrons according to its Lewis dot structure. In the Lewis symbol representation of ammonia, the N atom is enclosed by three points, each representing a pair of united electrons with a H atom.