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Arrange Ce^(3+),La^(3+), Pm^(3) and Yb^(...

Arrange `Ce^(3+),La^(3+), Pm^(3)` and `Yb^(3+)` in increasing order of their size -

A

`Yb^(3+) lt Pm^(3+) lt Ce^(3+) lt La^(3+)`

B

`Ce^(3+) gt Yb^(3+) lt Pm^(3+) lt La^(3+)`

C

`Yb^(3+) gt Pm^(3+) lt La^(3+) lt Ce^(3+)`

D

`Pm^(3+) lt La^(3+) lt Ce^(3+) gt Yb^(3+)`

Text Solution

Verified by Experts

The correct Answer is:
A
As `Z_("eff") uarr`, size `darr`
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