複選題
20.Select the correct electron configurations and quantum numbers considering LS coupling for various atoms.
(A)Ca: 1s²2s²2p⁶3s²3p⁶4s²3d¹; 3d¹: n=3, ℓ=2, mℓ=0,±1,±2
(B)Cu: 1s²2s²2p⁶3s²3p⁶4s²3d⁹; 3d⁹: n=3, ℓ=2, mℓ=0,±1,±2
(C)Cr: 1s²2s²2p⁶3s²3p⁶4s¹3d⁵; 3d⁵: n=3, ℓ=2, mℓ=0,±1,±2, ms=+
or-
(D)Ca: 1s²2s²2p⁶3s²3p⁶4s²3d⁵; 3d⁵: n=3, ℓ=2, mℓ=0,±1,±2, ms=+
or-
(E)K: 1s²2s²2p⁶3s²3p⁶4s¹; 4s¹: n=4, ℓ=0, mℓ=0, ms=±1/2, mj=±