Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

Key Idea Write the electronic configurations of given ions and find the correct answer. $$\begin{array}{rl}{\mathrm{Ni}}^{3+}(28)& =[\mathrm{Ar}]3{\mathrm{d}}^7\\ {\mathrm{Mn}}^{3+}(25)& =[\mathrm{Ar}]3{\mathrm{d}}^4\\ {\mathrm{Fe}}^{3+}(26)& =[\mathrm{Ar}]3{\mathrm{d}}^5\\ {\mathrm{Co}}^{3+}(27)& =[\mathrm{Ar}]3{\mathrm{d}}^6\end{array}$$