Calculate the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25.

Options

A. 5.9 B.M
B. 2.9 B.M
C. 6.9 B.M
D. 9.9 B.M

Answer

A

Explanation

`mu=sqrt(n(n+2))` B.M.
Electronic configuration of ion (25) = `1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^2`
No. of unpaired electrons (n) = 5
`mu=sqrt(5(5+2))=sqrt35=5.9 B.M`