56. Which of the following ions show higher spin only magnetic moment value?

(A) Ti³⁺

(B) Mn²⁺

(C)  Fe²⁺

(D) Co³⁺ 

<p><strong>56.&nbsp;</strong> (B) and (C)&nbsp;</p><p>Magnetic moment of an electron/dipole moment is caused by its intrinsic properties of spin and electric charge. It depends upon the number of unpaired electrons in its valence shell. The more the number of unpaired electrons, the greater will be the value of magnetic moment.</p><p>Electronic configuration:</p><p>Ti³⁺&nbsp;&nbsp;=&nbsp; 3d¹&nbsp;=&nbsp; 1 unpaired electron</p><p>Mn²⁺&nbsp;&nbsp;=&nbsp; 3d⁵&nbsp;=&nbsp; 5 unpaired electrons</p><p>Fe²⁺&nbsp;&nbsp;=&nbsp; 3d⁶&nbsp;=&nbsp; 4 unpaired electrons</p><p>Co²⁺&nbsp;&nbsp;=&nbsp; 3d⁷&nbsp;=&nbsp; 3 unpaired electrons&nbsp;</p><p>Out of all given options, Mn²⁺&nbsp;and Fe²⁺&nbsp; have unpaired electrons in number of five and four respectively. Hence, have higher spin only magnetic moment.&nbsp;</p>

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