Explain the formation of Ionic Bond with a suitable example.

Explanation

The electrostatic force of attraction between oppositely charged ions formed by the transfer of electrons" is called Ionic Bond.
Orbital concept of bonding : The method of formation of ionic bond in sodium chloride can be shown by the following orbital model :
Electronic configuations are :
`Na(Z=11)1s^(2)2s^(2)2p^(6)3s^(1) , Cl (Z=17)1s^(2)2s^(2)2p^(6)3s^(2)3p^(5)`

In the formation of sodium chloride, the 3s electron of Na atom is transferred to the half-filled 3p orbital of Cl atom. It gets paired up with it.

The `Na^(+)` and `Cl^(-)` ions thus formed will have the inert gas configuration of neon and argon and get attracted by coulombic electrostatic forces of attraction, forming `Na^(+)Cl^(-)`, ionic compound.