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The atomic number of `V,Cr, Mn and Fe` are respectively `23,24,25 and 26.` Which one of these may be expected to have the highest second ionization en

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The atomic number of `V,Cr, Mn and Fe` are respectively `23,24,25 and 26.` Which one of these may be expected to have the highest second ionization enthalpy?
A. Cr
B. Mn
C. Fe
D. V
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Correct Answer - A
`Cr(3d^(5)4s^(1))` is expected to have highest value of second ionsiation enthalpy.
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