1.

An ion `(Mn^(a+))` has the magnetic moment equal to `4.9` B.M` What is the value of (a) :A. `3`B. `4`C. `2`D. `5`

Answer» Correct Answer - A
Magnetic moment ` = sqrt (n(n+2)) = 4.9`,
`:. N=4`
Thus Mn ion bas four unpaied eelctron
`(n) Mn^(3+) : 1s^2 . 2s^2 , 2s^2 2p^y , 3s^2 3p^2 3p^6 3d^4`.


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