Question

The unit of electron affinity is:

• A. kcal/mole
• B. erg-sec
• C. $A^{\circ }$
• D. no unit

Answer 1

The correct option is A kcal/mole

Electron affinity is the energy released per mole of gaseous atom in order to form an anion.

Hence, its unit is energy/mol or J/mol or cal/mol or kcal/mol.

Hence, option A is correct.