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Why there is a sudden increase in the radius of Eu ropium? see the image....

Why there is a sudden increase in the radius of Europium?
see the image....

Question Image
Grade:12

1 Answers

Naveen Kumar
askIITians Faculty 60 Points
7 years ago
As we know that s electrons sheilds more and the extent of sheilding decreases in the order:
s>p>d>f
Also the sheilding of exactely half filled or full filled orbitals are higher as compared to the normal sheilding of that particular orbital.Here, F-rbtal is exactely half-filled and hence having more shilding which accouns for its irregular trendi nsize................................................................................................................................................................

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