A comapound in which a metal ion `M^(x+)(Z=25)` has a spin only magnetic moment of `sqrt24 `BM The number of unpaired electrons in the compound and the oxidation state of the metal ion respectively are

Options

A. 4 and 2
B. 5 and 3
C. 3and 2
D. 4 and 3

Answer

A

Explanation

Spin only magnetic moment ,
`mu=sqrt(n(n+2))=sqrt24BM`or `n^(2)+2n-24=0`
`implies(n+6)(n-4)=0`
`therefore " "n=4" " [becausen=-6" not possible"]`
Here, n is the number of unpaired electrons.
Since four unpaired electrons are present, the oxidation state must be `+2`.
`therefore Z+(25)=1s^(2),2s^(2),2p^(6),3s^(2)3p^(6),3d^(4)4s^(2)`