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

The correct option is B

High electron affinity, low ionisation energy

The formation of ionic bond depends upon easy formation of cation and anion. therefore the ionisation energy value of the metal atom should be low, so that it can easily form cation. on the other hand, the electron affinity value of the non-metal atom should be high so that it can easily form anion.