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Question: Answered & Verified by Expert
Calculated magnetic moment value for $\mathrm{Fe}^{2+}$ ion in $\mathrm{BM}$ is
Chemistryd and f Block ElementsAP EAMCETAP EAMCET 2022 (05 Jul Shift 2)
Options:
  • A $3.87$
  • B $4.90$
  • C $2.84$
  • D $1.73$
Solution:
1927 Upvotes Verified Answer
The correct answer is: $4.90$
$\mathrm{Fe}^{2+}\left(\mathrm{d}^6\right):$ Unpaired electrons $(\mathrm{n})=4$
$\therefore \quad \mu_{\text {s.o. }}=\sqrt{4(4+2)}=2 \sqrt{6}=4.89 \simeq 4.90 \mathrm{BM}$

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