JEE Main Chemistry question

Which series of elements have nearly the same atomic radii?

(A)F, Cl, Br, I
(B)Na, K, Rb, Cs
(C)Li, Be, B, C
(D)Fe, Co, Ni, CuCorrect

Answer: (D)

Solution

Within a transition series, the increase in nuclear charge across Fe, Co, Ni and Cu is largely offset by the increasing (though imperfect) shielding from added electrons,

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Question ID VK-147704