NEET UG 2005 — Chemistry Inorganic Chemistry

$$\begin{array}{|c|c|c|} \hline \text { Ion } & \begin{array}{c} \text { No. of } \\ \text { Electrons } \end{array} & \begin{array}{c} \text { Electronic } \\ \text { Configuration } \end{array} & \text{ Electronic Configuration in box } & \begin{array}{c} \text { No. of } \\ \text { Unpaired } \end{array} & \begin{array}{c} \text { Magnetic } \\ \text { Nature } \end{array} & \begin{array}{c} \text { Magnetic Mo- } \\ \text { ment (BM) } \\ \mu=\sqrt{n(\boldsymbol{n}+2)} \end{array} \\ \hline \mathrm{Sc}^{3+} & 18 & {[\mathrm{Ar}] 3 d^0 4 \mathrm{~s}^0} & [\mathrm{Ar}] ~ \begin{array}{|l|l|l|l|l|} \hline ~~ & ~~ & ~~ & ~~ & ~~ \\ \hline \end{array} ~~ \begin{array}{|l|} \hline ~~ \\ \hline \end{array} & 0 & \text { Diamagnetic } & 0 \\ \\ \hline \mathrm{Ti}^{3+} & 22 & {[\mathrm{Ar}] 3 d^4 4 \mathrm{~s}^0} & [\mathrm{Ar}] ~ \begin{array}{|l|l|l|l|l|} \hline \uparrow & ~~ & ~~ & ~~ & ~~ \\ \hline \end{array} ~~ \begin{array}{|l|} \hline ~~ \\ \hline \end{array} & 1 & \text { Paramagnetic } & 1.73 \\ \\ \hline \mathrm{Mn}^{2+} & 23 & {[\mathrm{Ar}] 3 d^5 4 \mathrm{~s}^0} & [\mathrm{Ar}] ~ \begin{array}{|l|l|l|l|l|} \hline \uparrow & \uparrow & \uparrow & \uparrow & \uparrow \\ \hline \end{array} ~~ \begin{array}{|l|} \hline ~~ \\ \hline \end{array} & 5 & \text { Paramagnetic } & 5.92 \\ \\ \hline \mathrm{Fe}^{2+} & 24 & {[\mathrm{Ar}] 3 d^6 4 \mathrm{~s}^0} & [\mathrm{Ar}] ~ \begin{array}{|l|l|l|l|l|} \hline \uparrow \downarrow & \uparrow & \uparrow & \uparrow & \uparrow \\ \hline \end{array} ~~ \begin{array}{|l|} \hline ~~ \\ \hline \end{array} & 4 & \text { Paramagnetic } & 4.9 \\ \\ \hline \end{array}$$ Ion Sc3+Ti3+Mn2+Fe2+​ No. of  Electrons ​18222324​ Electronic  Configuration ​[Ar]3d04 s0[Ar]3d44 s0[Ar]3d54 s0[Ar]3d64 s0​ Electronic Configuration in box [Ar]   ​  ​  ​  ​  ​​    ​​[Ar] ↑​  ​  ​  ​  ​​    ​​[Ar] ↑​↑​↑​↑​↑​​    ​​[Ar] ↑↓​↑​↑​↑​↑​​    ​​​ No. of  Unpaired ​0154​ Magnetic  Nature ​ Diamagnetic  Paramagnetic  Paramagnetic  Paramagnetic ​ Magnetic Mo-  ment (BM) μ=n(n+2)​​01.735.924.9​​

Related Theory Because of the relatively high forces of attraction among the water molecules due to intermolecular hydrogen bonding, water has $a$a higher surface tension than most other liquids. Related Theory Magnetic properties arise from the spin and orbital angular momentum of the electrons contained in a compound. Compounds are diamagnetic when they contain no unpaired electrons.