Question

Ionic compounds are formed most easily with:

• A. low electron affinity, high ionisation energy
• B. high electron affinity, low ionisation energy
• C. low electron affinity, low ionisation energy
• D. high electron affinity, high ionisation energy

Answer 1

Answer: (B)

high electron affinity, low ionisation energy

Answer 2

An ionic bond is formed between a electropositive metal and electronegative non metal. Metal forms cation and non metal form anion. $\therefore$ The formation of ionic bond is formed by (i) Low ionisation potential of metal. (ii) Greater value of electron affinity of non-metal. (iii) Higher value of lattice energy of resulting ionic compound.