| કૉલમ$-I$ | કૉલમ$-II$ |
| $(a)\;Co^{+3}$ | $(i)\;\sqrt{8}\; B.M.$ |
| $(b)\;Cr^{+3}$ | $(ii)\;\sqrt{35}\; B.M.$ |
| $(c)\;Fe^{+3}$ | $(iii)\;\sqrt{3}\; B.M.$ |
| $(d)\;Ni^{+2}$ | $(iv)\;\sqrt{24}\; B.M.$ |
| $(v)\;\sqrt{15}\; B.M.$ |
$(a)\quad (b)\quad (c)\quad (d)$
\(\mathrm{Co}^{3+} \rightarrow 1 \mathrm{s}^{2} 2 \mathrm{s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{s}^{0} 3 \mathrm{d}^{6}\)
\(n=4\)
\(\mu=\sqrt{4(4+2)}=\sqrt{24} \mathrm{B} \cdot \mathrm{M}\)
\(\mathrm{Cr}^{+3} \rightarrow 1 \mathrm{s}^{2} 2 \mathrm{s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{s}^{0} 3 \mathrm{d}^{3}\)
\(n=3\)
\(\mu=\sqrt{3(3+2)}=\sqrt{15} \mathrm{B} \cdot \mathrm{M}\)
\(\mathrm{Fe}^{3+} \rightarrow 1 \mathrm{s}^{2} 2 \mathrm{s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{s}^{0} 3 \mathrm{d}^{5}\)
\(n=5\)
\(\mu=\sqrt{5(5+2)}=\sqrt{35} \mathrm{B} . \mathrm{M}\)
\(\mathrm{N}_{1}^{+2} \rightarrow 1 \mathrm{s}^{2} 2 \mathrm{s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{s}^{2} 3 \mathrm{p}^{6} 4 \mathrm{s}^{0} 3 \mathrm{d}^{8}\)
\(n=2\)
\(\mu=\sqrt{2(2+2)}=\sqrt{8} \mathrm{B} \cdot \mathrm{M}\)
| સૂચિ$I$ સંકીર્ણ | સૂચિ$II$ સ્ફટિક ક્ષેત્ર વિભાજન ઊર્જા $\left(\Delta_0\right)$ |
| $A$ $\left[ Ti \left( H _2 O \right)_6\right]^{2+}$ | $I$ $-1.2$ |
| $B$ $\left[ V \left( H _2 O \right)_6\right]^{2+}$ | $II$ $-0.6$ |
| $C$ $\left[ Mn \left( H _2 O \right)_6\right]^{3+}$ | $III$ $0$ |
| $D$ $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$ | $IV$ $-0.8$ |
સવર્ગ આંક, ઓક્સિડેશન નંબર, ધાતુ પર $d-$ ઇલેક્ટ્રોનની સંખ્યા અને અયુગ્મિત $d-$ ઇલેક્ટ્રોનની સંખ્યા અનુક્રમે છે