Lewis dot arrangement for ammonia is illustrated by the outer electrons surrounding the N atom. The dot dot arrangement in the case of ammonia displays that the nitrogen atom unites 1 pair of e- with each of the three hydrogen atoms, resulting in a total of a trio joined pairs of electrons. The ammonia molecule adopts a trigonal pyramidal shape because of the placement of the outer electrons according to its Lewis dot structure. In the Lewis dotpoint depiction of NH3, the N atom is enclosed by three points, each representing a pair of joined electrons with a H atom.