The radius of $La^{3+} ($atomic number of $La = 57)$ is $1.06A.$ Which one of the following given values will be closest to the radius of $Lu^{3+}$? $($atomic number of $Lu = 71)$
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As we move from left to right in a raw, radii decreases.
So, radii of $Lu^{+3}$ should be lesser than $1.06A.$
So, radii of $Lu^{+3}$ should be lesser than $1.06A.$
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