Question

Which halogen has the highest value of negative electron gain enthalpy?

विकल्प

• Fluorine

• Chlorine

• Bromine

• Iodine

Answer 1

Chlorine

Explanation:

Iodine's electron gain enthalpy is less negative than chlorine's. However, due to the fluorine atom's small size, its negative electron gain enthalpy is lower than that of chlorine. In the comparatively small 2p orbitals, it exhibits extremely high inter electronic repulsion. As a result, the nucleus exerts less pull on incoming electrons.
∴ Chlorine has the highest value of electron gain enthalpy.