Which among the following elements in their respective oxidation states develops lowest spin only magnetic…
Which among the following elements in their respective oxidation states develops lowest spin only magnetic moment? (Atomic number $\mathrm{Cu}=29, \mathrm{Fe}=26, \mathrm{Ni}=28, \mathrm{Co}=27$ )
$\mathrm{Co}^{2+}$
$\mathrm{Cu}^{2+}$
$\mathrm{Fe}^{2+}$
$\mathrm{Ni}^{2+}$
Solution
$\mathrm{Cu}^{+2}$ due to greater charge has more tendency to show low spin only magnetic moment.