A) \[Fe-Co-Ni\]
B) \[Na-K-Rb\]
C) \[F-Cl-Br\]
D) \[Li-Be-B\]
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.You need to login to perform this action.
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