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The radius of `La^(+)` (at no 57) is `1.06Å`. What may be the radius of `Lu^(3+)`(at no.71)?

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The radius of `La^(+)` (at no 57) is `1.06Å`. What may be the radius of `Lu^(3+)`(at no.71)?
A. `1.6 Å`
B. `0.85 Å`
C. `1.06 Å`
D. `1.4 Å`
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1 Answer

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Correct Answer - B
Due to lanthanoid cantraction.
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