Question

Magnetic moment 2.84 B.M. is given by : (At. Nos., Ni = 28, Ti = 22, Cr = 24, Co = 27)

• A. Co²⁺
• B. Ni²⁺
• C. Ti³⁺
• D. Cr²⁺

Answer 1

The correct option is B

Ni²⁺

Magnetic moment $=\sqrt{n(n+2)}BM=2.84$ i.e., $n=2$

$N{i}^{+2}$ i.e., $3d^8$ contains two unpaired electrons