Identify the bond order and magnetic nature of - $\mathrm{Li}_2$ mólecule respectively.
Identify the bond order and magnetic nature of - $\mathrm{Li}_2$ mólecule respectively.
1 and diamagnetic
2 and diamagnetic
1 and paramagnetic
2 and paramagnetic
Solution
The electronic configuration of $\mathrm{Li}_2$ molecule is $(\sigma 1 \mathrm{~s})^2\left(\sigma^* 1 \mathrm{~s}\right)^2(\sigma 2 \mathrm{~s})^2$
Bond order of $\mathrm{Li}_2$ molecule
$=\frac{\mathrm{N}_{\mathrm{b}}-\mathrm{N}_{\mathrm{a}}}{2}=\frac{4-2}{2}=1$ Since no unpaired electron is present in lithium molecule, it is diamagnetic.