Question

Statement-I : $\text{K}>\text{Mg}>\text{Al}>\text{B}$ metallic character order. Statement-II: Ionic radius of any element is less than its atomic radius.

• A. Both statements are true
• B. Statement I is false but statement II is true.
• C. Both statements are False.
• D. Statement I is true but statement II is false.

Hint:

Metallic character is highest on the left and bottom of the periodic table. Cations are smaller than their parent atoms, while anions are larger.

Answer 1

The Correct Option is D

Statement I: Metallic character decreases across a period ($\text{K}$ is Group 1, $\text{Mg}$ is Group 2, $\text{Al}$ is Group 13, $\text{B}$ is metalloid). $\text{K}$ is the strongest metal here. Statement I is Correct.
Statement II: Anions (formed by non-metals) have ionic radii larger than their parent atomic radii ($r_{\text{anion}}>r_{\text{atom}}$). Statement II is Incorrect.