MHT CET 2022 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2022

Identify the correct decreasing order of atomic size from following

(A)Gd>Er>Pr>Yb
(B)Pr>Gd>Er>YbCorrect
(C)Yb>Er>Gd>Pr
(D)Pr>Yb>Er>Gd

Answer: (B)

Solution

Along the lanthanoid series the size of the atoms/ions decreases steadily with increasing atomic number because of the lanthanoid contraction (poor shielding by 4f electrons raises the effective nuclear

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Question ID VK-093704