# What is the electron configuration of H+?

When we talk of acidity in water, there is no such entity as ${H}^{+}$ or ${H}_{3} {O}^{+}$. We use these species in acid/base calculations, but we use them for convenience. As far as anyone knows, the acidium species in water is a cluster of 4-5 water molecules with an extra proton; i.e. ${\left[{H}_{9} {O}_{4}\right]}^{+}$. These clusters rapidly exchange a ${H}^{+}$ entity between themselves. If you play rugby, think of a maul, where the beefy forwards exchange the pill from hand to hand, and then peel off.