Question

Which of the following is an INCORRECT match?

• A. Metallic character: $\text{Al} > \text{Mg} > \text{B} > \text{K}$
• B. First Ionization Enthalpies: $\text{Na} < \text{Mg} > \text{Al} < \text{Si}$
• C. Electron Gain enthalpy: $\text{F} < \text{Cl} > \text{Br} > \text{I}$
• D. Ionic size: $\text{Na}^+ > \text{Mg}^{+2} > \text{Al}^{+3} > \text{Si}^{+4}$

Hint:

Alkali metals (Group 1) like Potassium ($\text{K}$) are always the most metallic elements in their respective periods. Seeing Potassium placed at the very bottom of the metallic character chain in Option (A) immediately flags it as the incorrect match.

Answer 1

The Correct Option is A