Question

What is the value of effective magnetic moment found in +3 oxidation state of Chromium (Z = 24)?

Options

• 1.73 BM

• 4.90 BM

• 2.84 BM

• 3.87 BM

Answer 1

3.87 BM

Explanation:

\[\ce{Cr^{3+} -> 3d^3}\] (3 unpaired electrons)

∴ µ = `sqrt("n"("n" + 2)) = sqrt(3(3 + 2))` = 3.87 BM