What are the conditions for the formation of an electrovalent bond ?

The conditions for the formation of an electrovalent bond are:

1. Low ionisation potential — If the ionisation potential of a particular atom is low, it will lose electron(s) easily, i.e., a cation is formed easily.
2. High electron affinity — If the electron affinity value is high, anion will be formed easily.
3. Large electronegativity difference — If the difference in the electronegativities of two elements is higher, then the transfer of electrons will be easier.