Question

The atomic number of vanadium (V), chromium (Cr), manganese (Mn) and iron are respectively : [23, 24, 25 and 26]

Which one of these may be expected to have the highest second ionization enthalpy?

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

Answer 1

Answer: (B)

$Cr$

$C{r}^{+}:\left[Ar\right]3d^5$ have stable half filled configuration so it has highest second ionization energy.