Question

Electron gain enthalpy with/negative sign of fluorine is less than that of chlorine due to

• A. high ionisation enthalpy of fluorine
• B. smaller size of chlorine atom
• C. smaller size of fluorine atom
• D. bigger size of 2p orbital of fluorine

Answer 1

Answer: (C)

Due to smaller size and high repulsive force within the outermost orbit of fluorine, its electron gain enthalpy is less negative.