D-And F-Block Elements Ques 395

Question: The atomic radii of the elements are almost same of which series

Options:

A) $ Fe-Co-Ni $

B) $ Na-K-Rb $

C) $ F-Cl-Br $

D) $ Li-Be-B $

Show Answer

Answer:

Correct Answer: A

Solution:

$ Fe-CO-Ni $ .

With the increase in the d-electrons, screening effect increases, this counter balances the increased nuclear charge due to increase in atomic number.

As a result atomic radii remain practically same after chromium.



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