What is the magnetic moment (in BM) of a transition metal ion with 3 unpaired electrons?
Using the spin-only formula: μ = √[n(n+2)] = √[3(3+2)] = √15 ≈ 3.87 BM
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Oxidation States and Colour and Magnetic Properties of d-Block