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QNEET-2020-Ch-671: NEET 2020 Chemistry - Class 12 NEET-2020-Ch-671 Solution: The calculated spin only magnetic moment of \(Cr^{2+}\) ion is? …
The calculated spin only magnetic moment of ion is? 4.90 BM 5.92 BM 2.84 BM 3.87 BM
Multiple Choice Options
- A 4.90 BM
- B 5.92 BM
- C 2.84 BM
- D 3.87 BM
Step-by-Step Verified Solution
Electronic configuration of C r : [ A r ] 3 d 5 4 s 1
Electronic configuration of C r 2 + :[Ar]3d 4
No. of unpaired electrons = 4
Spin only magnetic moment = n ( n + 2 )
n = number of unpaired e _
Spin only magnetic moment = 4 ( 4 + 2 )
= 24
BM
= 4.9 BM