Lewis dot arrangement in the case of NH3 is depicted by the valence electrons surrounding the N atom. The dot dot structure for NH3 exhibits that the N atom joins a solitary pair of electrons with each of the three H atoms, resulting in a total of three joined pairs of electrons. The ammonia molecule takes a three-sided pyramid-like structure due to the arrangement of the valence electrons according to its Electron pair dot structure. In the dot dotpoint depiction of ammonia, the N atom is encircled by three points, each representing a pair of joined electrons with a hydrogen atom.

9 Covalent Bonding Chemistry LibreTexts