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The calculated magnetic moment of a diva...

The calculated magnetic moment of a divalent ion of an atom with atomic number 24 in aqueus solution is

A

`4.90 BM`

B

`5.92 BM`

C

`3.87 BM`

D

`2.84 BM`

Text Solution

Verified by Experts

The correct Answer is:
A
`""_(24) M = 1 s ^(2) , 2s ^(2), 2p ^(6) , 3s ^(2) , 3d ^(5), 4s ^(1)`
`= [Ar]3d ^(5) 4s ^(1)`
`M ^(2+)= [Ar] 3d ^(4)`

`therefore` Number of unpaired electrons = 4
`therefore` Mognetic moment, `mu = sqrt ( n ( n +2))`
`therefore mu = sqrt(4 (4 +2))`
`= sqrt24 = 4.90 BM`
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