Question

Which of the following is a paramagnetic substance?

• A. $M{g}^{2+}$
• B. $C{u}^{+}$
• C. $M{n}^{7+}$
• D. $T{i}^{2+}$

Answer 1

The correct option is D $T{i}^{2+}$

The configuration of different species are:
$M{g}^{2+}-1s^{2}2s^{2}2p^6$
$M{n}^{7+}-\left[Ar\right]3d^0$
$C{u}^{+}-\left[Ar\right]3d^{10}$
$T{i}^{2+}-\left[Ar\right]3d^2$
Only $T{i}^{2+}$ have two unpaired electron.
Thus, $T{i}^{2+}$ is a paramagnetic in nature.