JEE Main 2024 — Structure of Atom Question with Solution

A magnetic moment is a quantity that represents the magnetic strength and orientation of a magnet or any other object that produces a magnetic field. More precisely, a magnetic moment refers to a magnetic dipole moment, the component of the magnetic moment that can be represented by a magnetic dipole. The greater the number of unpaired electrons, the higher will be the magnetic moment.

Magnetic moment$=\sqrt{\mathrm{n}\left(\mathrm{n}+2\right)}$

$\begin{array}{|ccccc|}\hline & 3 {\mathrm{d}}^7& 3 {\mathrm{d}}^8& 3 {\mathrm{d}}^3& 3 {\mathrm{d}}^6\\ \begin{array}{l}\text{ No. of. }\\ \text{ unpaired }{\mathrm{e}}^{-}\end{array}& 3& 2& 3& 4\\ \begin{array}{l}\text{ Spin only }\\ \text{ Magnetic }\\ \text{ moment }\end{array}& \begin{array}{l}\sqrt{15}\\ \mathrm{BM}\end{array}& \begin{array}{c}\sqrt{8}\\ \mathrm{BM}\end{array}& \begin{array}{l}\sqrt{15}\\ \mathrm{BM}\end{array}& \begin{array}{l}\sqrt{24}\\ \mathrm{BM}\end{array}\\ \hline\end{array}$

Hence, the answer is option D.