Question
The spin only magnetic moment of Fe ^ 3+ ion (in BM) is approximately.
BITSAT
Chemistry
Chemical Bonding and Molecular Structure
2024
BITSAT 2024 (Memory Based Paper 3)
BITSAT Chemistry Question (2024) — Solution
Options
- A. 4
- B. 5
- C. 6
- D. 7
Answer
C. 6
Step-by-step solution
Electronic configuration of Fe . aligned _ 26 Fe & =[ Ar ] 3 d^6 4 s^2 \\ Fe ^ 3+ & =[ Ar ] 3 d^5 aligned Number of unpaired electrons, n=5 Spin only magnetic moment, _s= n(n+2) BM gathered _s= 5(5+2) \\ _s= 35 \\ _s=5.85 BM or _s 6 BM gathered
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