Zinc (Zn) — its atomic orbitalsZinc is element 30: period 4, group 12, transition metal of the d block. Its ground-state configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s², so its outermost occupied shell is n = 4 and holds 2 electrons.Each orbital below is the hydrogen-like solution at the effective nuclear charge Slater's rules give its subshell, so its radial nodes and its angular nodes fall where the wavefunction changes sign rather than where a drawing puts them. Slater screening gives the effective charge; the energy is the hydrogen-like −13.606 Z_eff²/n², and ⟨r⟩ the mean radius of one orbital of the subshell.

Subshell

Electrons

Z_eff

Energy (eV)

Radial nodes

Angular nodes

⟨r⟩ (Å)

29.70

-12001.45

0.027

25.85

-2272.91

0.123

25.85

-2272.91

0.102

18.75

-531.47

0.381

18.75

-531.47

0.353

4.35

-16.09

2.920

8.85

-118.40

0.628

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