MHT CET 2024 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2024

Which element from following has lowest ionization enthalpy ?

(A)Cu
(B)ScCorrect
(C)Mn
(D)Zn

Answer: (B)

Solution

Across the 3d series the first ionisation enthalpy rises only slowly, because the added electrons enter the inner 3d subshell and shield the nuclear charge. Approximate values (kJ mol): Sc 633, Mn 717, Cu 745, Zn 906. Scandium () is at the beginning of the series, has the lowest

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Question ID VK-096808