A transition metal complex has an experimentally determined spin-only magnetic moment of . Which of — Atomic Structure Chemistry Question

💡 Solution & Explanation

The magnetic moment $\approx 2.83 \text{ BM}$ implies $n=2$ unpaired electrons since $\sqrt{n(n+2)} = \sqrt{2(4)} = \sqrt{8} \approx 2.828$. $Ni^{2+}$ has the configuration $[Ar] 3d^8$, which contains exactly 2 unpaired electrons.