Question

How many out of the following has more paramagnetic character than $T{i}^{2+}$ ion?
$S{c}^{3+},C{r}^{2+},C{o}^{2+},F{e}^{2+},M{n}^{2+},C{u}^{2+}$

Answer 1

Answer: 4

Paramagnetism arises due to the presence of unpaired electrons. As the number of unpaired electrons increases, the magnetic moment increases and hence the paramagnetic character also increases.
$T{i}^{2+}\Rightarrow 3d^2\Rightarrow 2$ unpaired $e^{-}$
$S{c}^{3+}\Rightarrow 3d^0\Rightarrow 0$ unpaired $e^{-}$
$C{r}^{2+}\Rightarrow 3d^4\Rightarrow 4$ unpaired $e^{-}$
$C{o}^{2+}\Rightarrow 3d^7\Rightarrow 3$ unpaired $e^{-}$
$F{e}^{2+}\Rightarrow 3d^6\Rightarrow 4$ unpaired $e^{-}$
$M{n}^{2+}\Rightarrow 3d^5\Rightarrow 5$ unpaired $e^{-}$
$C{u}^{2+}\Rightarrow 3d^9\Rightarrow 1$ unpaired $e^{-}$
$C{r}^{2+},C{o}^{2+},F{e}^{2+}$ and $M{n}^{2+}$ have more paramagnetic character than $T{i}^{2+}$ ion.