An Ionic bond is a type of chemical bond which involves the transfer of one or more electrons from one atom to another atom. As a result, anions and cations are formed which subsequently form a molecule. For example

Na + Cl → Na+ + Cl− → NaCl

The favourable factors influence in ionic bond formation are as follows:

(i) Low ionization enthalpy of metal atom.

(ii) The two ion must be different & should possess opposite charge

(iii) High electron gain enthalpy (Δeg H) of a non-metal atom.

(iv) High lattice energy of the compound formed.