Exam

JIPMER

Year

2019

Subject

Chemistry

Chapter

Coordination Compounds

JIPMER 2019 · Chemistry · Coordination Compounds

The magnetic moment of Ni^ 2+ ion (atomic number of Ni=28 ) in BM...

The magnetic moment of $\mathrm{Ni}^{2+}$ ion (atomic number of $\mathrm{Ni}=28$ ) in BM unit is

Step-by-step solution

$\mathrm{Ni}_{28}=[\mathrm{Ar}]_{18} 3 \mathrm{~d}^8 4 \mathrm{~s}^2, \mathrm{Ni}^{2+}=[\mathrm{Ar}]_{18} 3 \mathrm{~d}^8 4 \mathrm{~s}^2$ Number of unpaired electrons $=2$ Magnetic moment, $\mu=\sqrt{n(n+2)}=\sqrt{2(2+2)}=\sqrt{8}=2.84 \mathrm{BM}$