Electron pair Beverage cup structure in the case of NH3 is a representation of the outer electrons surrounding the N atom. The dot point arrangement for ammonia reveals that the N atom joins 1 pair of e- with each of the three hydrogen atoms, resulting in a complete of three shared pairs of electrons. The ammonia molecule takes a trigonal pyramidal form attributed to the placement of the outer electrons according to its Electron pair Beverage cup structure. In the dot symbol depiction of NH3, the N atom is enveloped by three spots, each representing a pair of united electrons with a H atom.

104 Covalent Lewis Structures Chemistry LibreTexts