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12 Lewis Theory of Bonding Chemistry LibreTextsElectron pair Beverage cup arrangement for NH3 is a representation of the outer electrons surrounding the nitrogen atom.
The dot point structure for ammonia unveils that the nitrogen atom unites one pair of electrons with each of the three H atoms, resulting in a total of 3 united pairs of electrons.
The ammonia molecule adopts a three-sided pyramid-like shape due to the placement of the valence electrons according to its Lewis dot structure.
In the Lewis dotpoint depiction of ammonia, the N atom is surrounded by three spots, each representing a pair of joined electrons with a H atom.