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.
