Question

Electron gain enthalpy depends on:

• A. Atomic size
• B. Effective Nuclear charge
• C. Screening or shielding effect
• D. Stability of half filled and completely filled orbitals.

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A

Atomic size

B

Effective Nuclear charge

C

Screening or shielding effect

D

Stability of half filled and completely filled orbitals.

Electron gain enthalpy depends on two factors:
(i) Atomic size
(ii) Nuclear charge
Smaller atomic size means stronger nuclear pull on the electrons. Thus, the energy required to add an extra electron will be less. So, the value of (positive) electron gain enthalpy will be low.