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The radius of La^(3+)(Z=57) is 106 pm. W...

The radius of `La^(3+)(Z=57)` is 106 pm. Which one of the following given values will be closest to the radius of `Lu^(3+)(Z=71)`?

A

1.40Å

B

1.06Å

C

0.85Å

D

1.60Å

Text Solution

Verified by Experts

The correct Answer is:
C
On moving across the period the size of the metal atoms and their ions decrease. Hence the size of `Lu^(3)`+ will be much smaller than `La^(3) +`
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