The ionic radius of `._(57)La^(3+)` is 1.06Å. Which one of the following given values will be closest to the ionic radius of `._21Lu^(3+)`?
The ionic radius of `._(57)La^(3+)` is 1.06Å. Which one of the following given values will be closest to the ionic radius of `._21Lu^(3+)`?
A. 1.06Å
B. 1.56Å
C. 0.85Å
D. 1.35Å
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Correct Answer - D
Ionic radius of `Lu^(3+)` is smaller than that of `La^(3+)`because of lanthanide contraction across the period.
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