Electron pair Beverage cup arrangement in the case of NH3 is portrayed by the outer electrons surrounding the N atom. The Lewis dot arrangement in the case of ammonia reveals that the N atom connects one pair of e- with each of the three H atoms, resulting in a total of a trio joined pairs of electrons. The NH3 molecule takes a trigonal pyramidal structure due to the arrangement of the outer electrons according to its Lewis dot structure. In the Lewis symbol representation of NH3, the nitrogen atom is surrounded by three spots, each representing a pair of united electrons with a H atom.

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