Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?
A) +1
B) -1
C) +2
D) -2

Question

Quizplus · Accepted Answer

Nitrogen, with a valence of five, forms four covalent bonds in ammonium, sharing an extra pair of electrons than it normally does. This results in a positive charge, making the ammonium ion (NH4+) have a charge of +1.

Nitrogen (N) Normally Forms Three Covalent Bonds with a Valence