Question

11. Explain the exceptional configuration of copper and chromium.

Answer 1

because half filled and completely filled orbitals are more stable,that why copper and chromium have exceptional electronic configuration
$\\ cr = 1 {s}^{2} 2 {s }^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 4 {s}^{2} 3 {d}^{4}$
$cu = 1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 4 {s}^{1} 3 {d}^{10}$