Question

The expression for effective magnetic moment $(\mu _{\text{eff}})$ is

• A. $\mu_{\text{eff}}=\sqrt{n(n+2)}\,BM$
• B. $\mu_{\text{eff}}=\sqrt{2(n+2)}\,BM$
• C. $\mu_{\text{eff}}=\sqrt{n(2n+2)}\,BM$
• D. $\mu_{\text{eff}}=\sqrt{n(n+1)}\,BM$

Answer 1

Answer: (A)

$\mu_{\text{eff}}=\sqrt{n(n+2)}\,BM$

Answer 2

Effective magnetic moment $(\mu_{\text{eff}})$ is
$\mu =\sqrt{n(n+2)}$
where, $n =$ number of unpaired electrons.
A single unpaired electron has a magnetic moment of $1.73$ Bohr magneton $(BM)$.