Chemistry - Atomic Structure Question with Solution | TestHub

$\text{μ}=\sqrt{\text{n}\left(\text{n}+2\right)}=2.84\Rightarrow \text{n}=2$

electronic configuration of${\text{Ni}}^{+2}=1{\text{s}}^{2}2{\text{s}}^{2}2{\text{p}}^{6}3{\text{s}}^{2}3{\text{p}}^{6}3{\text{d}}^8 {\text{e}}^{-}$having two unpaired electrons

electron configuration of$\text{T}{\text{i}}^{3+}=1{\text{s}}^{2}2{\text{s}}^{2}2{\text{p}}^{6}3{\text{s}}^{2}3{\text{p}}^{6}3{\text{d}}^1$only one unpaired electron

electron configuration of$\text{C}{\text{r}}^{2+}=1{\text{s}}^{2}2{\text{s}}^{2}2{\text{p}}^{6}3{\text{s}}^{2}3{\text{p}}^{6}3{\text{d}}^4$having four unpaired electrons

electron configuration of$\text{C}{\text{o}}^{+2}=1{\text{s}}^{2}2{\text{s}}^{2}2{\text{p}}^{6}3{\text{s}}^{2}3{\text{p}}^{6}3{\text{d}}^7$having three unpaired electrons.