Ionic potential
Ionic potential is the ratio of the electrical charge (z) to the radius (r) of an ion. Ionic potential = electrical charge ionic radius = z r {\displaystyle {\text{Ionic potential}}={\frac {\text{electrical charge}}{\text{ionic radius}}}={\frac {z}{r}}} As such, this ratio is a measure of the charge density at the surface of the ion; usually the denser the charge, the stronger the bond formed by the ion with ions of opposite charge.