d and f-Block ElementsHard

Question

The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy ?

Options

A.Cr
B.Mn
C.Fe
D.V

Solution

Electronic configuration of Cr is

So due to half filled orbital I.P. is high of Cr.

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