Lewis Beverage cup arrangement for ammonia is portrayed by the outer electrons surrounding the N atom. The Lewis dot structure in the case of NH3 displays that the N atom joins one pair of e- with each of the three hydrogen atoms, resulting in a complete of 3 connected pairs of electrons. The NH3 molecule takes a trigonal pyramidal shape because of the distribution of the valence electrons according to its Electron pair Beverage cup structure. In the Lewis dotpoint depiction of NH3, the nitrogen atom is encircled by three dots, each representing a pair of joined electrons with a hydrogen atom.