Question

Magnetic moment 2.83 BM is given by which of the following ions?
`"At. nos. Ti=22, Cr=24, Mn=25,Ni=28"`
A. `Mn^(2+)`
B. `Cr^(3+)`
C. `Ni^(2+)`
D. `Mn^(4+) and O_(2)`

Answer 1

Correct Answer - C
Magnetic moment `(mu)` is given by the relation
`mu=sqrt(n(n+2))`
`2.83=sqrt(n(n+2))`
`8=n(n+2)` n=2
No. of unpaired electrons is given by `Ni^(2+)` ion.