1. The complete transfer of electrons leads to the formation of a cation and an anion. Both these ions are held together by electrostatic attractive forces which is known as ionic bond.
2. KCl: Potassium chloride
Electronic configuration of K[Ar] 4s
Eleçtronic configuration of Cl = [N]3s23p5
3. Potassium has 1 electron in its valence shell and chlorine has 7 electrons in its valence shell.
4. By losing one electron potassium attains the nearest inert gas configuration of Argon and becomes a unipositive cation (K) and chlorine accepts this electron to become uninegative chloride ion (CI) to attain the stable configuration of nearest noble gas, Argon.
5. These two ions combine to form an ionic crystal in which they are held together by electrostatic attractive forces.
6. During the formation of one mole of potassium chloride crystal from its constituent ions, 718 kJ of energy is released. This favours the formation of KCl and its stabilisation.
