MHT CET 2025 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2025

Which element from following has smallest ionic size in +3 state?

(A)LuCorrect
(B)La
(C)Dy
(D)Nd

Answer: (A)

Solution

Along the lanthanoid series the nuclear charge increases while electrons enter the inner 4f subshell, which shields poorly; this causes a steady decrease in atomic and ionic radii, the lanthanoid contraction. The order of

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Question ID VK-102673