Question

The calculated spin only magnetic moment of Cr²⁺ ion is ______.

Options

• 3.87 BM

• 4.90 BM

• 5.92 BM

• 2.84 BM

Answer 1

The calculated spin only magnetic moment of Cr²⁺ ion is 4.90 BM.

Explanation:

The atomic number of chromium is 24. The electronic configuration of  Cr is [Ar] 3d4. So the number of unpaired electrons (n) is 4.

μ = `sqrt(n(n + 2))`BM

= `sqrt(4(4 + 2))`

= `sqrt 24`

= 4.90 BM