Question

Which of the following transition metal ions will have definite value of magnetic moment?

• A. $S{c}^{3+}$
• B. $T{i}^{3+}$
• C. $C{u}^{+}$
• D. $Z{n}^{2+}$

Answer 1

The correct option is B $T{i}^{3+}$

Value of magnetic moment depends upon number of unpaired electrons. All given metal ions (except $T{i}^{3+}\left(3d^1\right)$) have either fully filled d-subshell ( $Z{n}^{2+},C{u}^{+}$) or empty d-subshell ( $S{c}^{3+}$). As such only $T{i}^{3+}$ has a net value of magnetic moment.

Magnetic moment of $T{i}^{3+}=\sqrt{n(n+2)}BM=\sqrt{1(1+2)}BM=\sqrt{3}BM=1.73BM$.