Which of the following ions form most stable complex compound[
$C{u^{ + 2}}$
$N{i^{ + 2 }}$
$F{e^{ + 2 }}$
$M{n^{ + 2 }}$
In nitroprusside ion, the iron exists as $Fe^{2+}$ and $NO$ as $NO^+$ rather than $Fe^{3+}$ and $NO$ respectively. These forms of ions are established with the help of
Why first ionisation enthalpy of $\mathrm{Cr}$ is lower than that of $\mathrm{Zn}$ ?
The property, which is not characteristic of transition metals