Lewis Beverage cup arrangement in the case of ammonia is portrayed by the valence electrons surrounding the nitrogen atom. The dot dot structure in the case of NH3 exhibits that the N atom unites 1 pair of e- with each of the three hydrogen atoms, resulting in a overall of a trio joined pairs of electrons. The NH3 molecule adopts a three-sided pyramid-like form attributed to the placement of the valence electrons according to its Lewis dot arrangement. In the dot symbol representation of ammonia, the N atom is enclosed by three spots, each representing a pair of joined electrons with a H atom.