The spin only magnetic moment of Cr3+ cation is _____.

Q.1 (i) The spin only magnetic moment of Cr³⁺ cation is _____.

A. 3.742 BM

B. 3.755 BM

C. 3.873 BM

D. 3.633 BM

Doubtly Asked 29 Oct 2026 Board exam · March 2024 hsc 12th Save WhatsApp Report

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Answer: C. 3.873 BM

Answer: (c) 3.873 BM

Cr (Z = 24): [Ar] 3d⁵ 4s¹; Cr³⁺: [Ar] 3d³, so n = 3 unpaired electrons.

\(\mu = \sqrt{n(n+2)} = \sqrt{3 \times 5} = \sqrt{15} = 3.873\) BM

Doubtly AI · 29 Oct 2026 AI-generated · not yet verified Report

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