Representatives of which class have an ionic bond.

The ionic bond itself is a strong, chemical bond that appears as a result of the electrostatic attraction of cations and anions. It is also (extreme polarization), a covalent polar bond. It is formed, both between the metal and not the metal. Some of the following elements have this ionic bond: KCI, Na2O, LiOH, CaSO4, MgS. These are some of them. The essence of the ionic bond can also be well considered, using the example of the formation of sodium chloride, because sodium, as an alkali metal, is able to donate an electron located on the outer electron layer. As a result, sodium will share its electron with chlorine.