MHT CET 2026 Chemistry question

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

(A)Pa
(B)Cm
(C)Fm
(D)LrCorrect

Answer: (D)

Solution

In the 5f series there is a gradual decrease in the size of the ions with increasing atomic number (actinoid contraction), because the 5f electrons shield the increasing nuclear charge poorly. The given elements have atomic numbers Pa

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Question ID VK-100420