Lewis Beverage cup structure in the case of NH3 is a representation of the valence electrons surrounding the nitrogen atom.
The dot dot arrangement for NH3 displays that the N atom joins 1 pair of e- with each of the three H atoms, resulting in a complete of 3 united pairs of electrons.
The NH3 molecule takes a three-sided pyramid-like shape attributed to the arrangement of the valence electrons according to its Lewis Beverage cup arrangement.
In the Lewis symbol representation of NH3, the N atom is surrounded by three spots, each representing a pair of shared electrons with a H atom.
NH3 Lewis Structure Molecular Geometry Hybridization Bond