Question

Group 15 elements have more electron gain enthalpy than group 16 elements. The correct reason for this is

• A. Poor shielding in group 15
• B. Poor shielding in group 16
• C. Half-filled stability of group 15 elements
• D. Half-filled stability of group 16 elements

Hint:

Group 15 elements have half-filled p-orbitals, making them more stable and leading to higher electron gain enthalpy.

Answer 1

The Correct Option is C

Step 1: Understanding Electron Gain Enthalpy.
Group 15 elements (such as nitrogen) have a half-filled p-orbital configuration, which is more stable. This results in a higher electron gain enthalpy compared to group 16 elements, which do not have this half-filled stability.
Step 2: Conclusion.
The correct answer is (C), Half-filled stability of group 15 elements.