Electron pair dot arrangement in the case of NH3 is a representation of the outer electrons surrounding the N atom.
The Lewis dot structure in the case of NH3 displays that the nitrogen
atom connects one pair of e- with each of the three hydrogen atoms, resulting in a overall of three shared pairs of electrons.
The ammonia molecule adopts a trigonal pyramidal shape because of the arrangement of the outer electrons according to its Lewis Beverage cup arrangement.
In the dot dotpoint depiction of ammonia, the N atom is enclosed by three points, each representing a pair of shared electrons with a hydrogen atom.
Lewis Structure Study Striver
