Multi-electron atoms: orbital approximation; electron spin; Pauli exclusion principle; slater determinants. Post author By Miraj Ahmad Ansari Post date December 2, 2020 GATE CHEMISTRY Structure Multi-electron atoms: orbital approximation; electron spin; Pauli exclusion principle; slater determinants. Lesson Progress 0% Complete Previous Topic Back to Lesson Next Topic ← Hydrogen and hydrogen-like atoms : atomic orbitals; radial distribution function. → Approximation Methods: Variation method and secular determinants; first order perturbation techniques.