Question

Magnetic moment 2.83 BM is given by which of the
following ions? (At. number Ti = 22, Cr = 24, Mn =
25, Ni = 28)
3) Cr3+
4) Mn2+
1) Ti3+
2) Ni2+
and also tell how the answer has come​

Answer 1

Answer:

Option ( D ) Ni²+

Explanation:

The electronic configuration

Ni2+ = [Ar]3d8 4s0 (two unpaired electron)

Ti3+ = [Ar] 3d1 4s0 ( one unpaired electrons)

Cr3+ = [Ar] 3d3 ( three unpaired electrons)

Co2+ = [Ar],3d7, 4s0 (three unpaired electrons)

Ni2+ has 2 unpaired of electrons