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In general , the configuration of lantha...

In general , the configuration of lanthanides in `(n-2) f^(1-14) (n-1) s^(2) p^(6) d^(0-1) ns^(2)` . It has been observed that , with increase in atomic number of lanthanides , there is a gradual decrease in ionic radii from La `(1.22 A^(@))` to `Lu(0.99 A^(@))` . The reason for decrease in ionic radii is an increase in

A

Electronegative character

B

Valency electrons and number of shells

C

Atomic and ionic volumes

D

Nuclear attraction for valence electrons leading to inward shrinking of shell

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The correct Answer is:
D
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