Given below are two statements:

Statement I: The metallic radius of Al is less than that of Ga.

Statement II: The ionic radius of is less than that of .

Choose the most appropriate answer:

Question

Given below are two statements:

Statement I: The metallic radius of Al is less than that of Ga.

Statement II: The ionic radius of  is less than that of .

Choose the most appropriate answer:

Canvas Classes · Accepted Answer

Strategy:
 Contrast metallic (atomic) radius with ionic radius for Aluminum and Gallium.

Step 1: Evaluate Statement I
- Atomic size generally increases down a group, but the poor shielding of the  series in Gallium leads to "d-block contraction".
- Metallic Radius: . Thus, Aluminum is greater than Gallium. (False)

Step 2: Evaluate Statement II
- Ionic radii for  ions: .
- In the ionic state, the extra shell presence in Gallium dominates over the contraction effect seen in the neutral state. (T

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