Which of the following magnetic moment values will correspond to the highest ionization energy for the element which is placed in 4th period and 7th group of long form of periodic table?

The magnetic moment values will correspond to the highest ionization energy for the element which is placed in 4th period and 7th group of long form of periodic table is $\begin{array}{r}2\sqrt{2}\end{array}$

The formula for magnetic moment is,

$\mu =\sqrt{n(n+2)}$

Where n is the number of unpaired electrons,. The unpaired electrons for Mn+5 , Mn+4 , Mn+3 and Mn+4 are 2,3,4 and 5 respectively

The magnetic moment for n=2 is,

$\mu =\sqrt{2(2+2)}$

$\mu =2 \sqrt{2}$

Hence, I.E. is higher in species having more positive charge.