Electron pair Beverage cup arrangement in the case of NH3 is depicted by the outer electrons surrounding the N atom. The dot dot structure for ammonia exhibits that the nitrogen atom shares one pair of electrons with each of the three hydrogen atoms, resulting in a total of 3 joined pairs of electrons. The NH3 molecule adopts a trigonal pyramidal shape due to the distribution of the valence electrons according to its Electron pair Beverage cup arrangement. In the Lewis dotpoint representation of ammonia, the nitrogen atom is surrounded by three spots, each representing a pair of united electrons with a H atom.