Lewis Beverage cup arrangement for ammonia is a representation of the outer electrons surrounding the N atom. The Lewis point arrangement in the case of NH3 displays that the N atom connects one pair of e- with each of the three hydrogen atoms, resulting in a complete of 3 shared pairs of electrons. The NH3 molecule adopts a trigonal pyramidal shape due to the placement of the valence electrons according to its Electron pair dot structure. In the dot symbol depiction of NH3, the nitrogen atom is encircled by three dots, each representing a pair of united electrons with a hydrogen atom.