Arrange C e + 3 , L a + 3 , P m + 3 and Y b + 3 in increasing order of their ionic radii Options: A . &nbspYb+3 B . &nbspCe+3 C . &nbspYb+3 D . &nbspPm+3

Arrange Ce+3,La+3,Pm+3 and Yb+3 in increasing order of their ion

Question

Arrange

C e^{+ 3}, L a^{+ 3}, P m^{+ 3}

and

Y b^{+ 3}

in increasing order of their ionic radii

Options:

A . Yb+3

B . Ce+3

C . Yb+3

D . Pm+3

Answer: Option A
:
A
Due to Lanthanoid contraction order will be

Y b^{+ 3} < P m^{+ 3} < C e^{+ 3} < L a^{+ 3}

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