The number of unpaired electrons in $C{r}^{3+}$ ion is:

Q. Find the number of unpaired electrons in ${Cr}^{3+}$ ion.

Q. The number of unpaired electrons in a chromic ion $C{r}^{3+}$ $($atomic number $24)$ is:

Q. The correct order of the number of unpaired electrons in the ions, ${\text{Cu}}^{2+},{\text{Ni}}^{2+},{\text{Fe}}^{3+}\text{and}{\text{Cr}}^{3+}$ is

Q. Number of unpaired electrons in $F{e}^{2+}$ ion is:

Q. Although \(Cr^{3+}\)and \(Co^{2+}\) ions have the same number of unpaired electrons, the magnetic moment of \(Cr^{2+}\) is 3.87 B.M. and that of \(Co^{2+}\)is 4.87 𝐵.𝑀. Why?