Question

Show the formation of the following molecule:

Ammonia NH₃

Answer 1

Nitrogen has the electronic configuration $2,5$ (5 valence electrons) and needs 3 more electrons to complete its octet. Each hydrogen atom has 1 valence electron and needs 1 more to complete its duplet. Each of the three hydrogen atoms shares one electron with the nitrogen atom, forming three single covalent bonds ($\text{NH}_3$), leaving one lone pair on the nitrogen atom.