Atomic radii and the trends; ionic radii and the trends with cations and anions; electron configurations of ions; isoelectronic species; diamagnetism and paramagnetism of atoms and ions

Electron configurations (exceptions to predicted configurations); configurations of lanthanides and actinides; ionization energy; successive ionizations; trends in ionization energy; electron affinity

Building up process in multielectron atoms (aufbau principle); shielding of nuclear charges; penetration of electrons in various orbitals; ordering of orbitals in multielectron atoms; notations for electron configurations (spectroscopic, noble gas, orbital box); using the periodic table to determine configurations

Radial probability distributions of orbitals (shape and size of orbitals); orbital diagram of H atom (degenerate orbitals for n ≥ 2); electron spin quantum number and its value; Pauli exclusion principle and how it applies to multi-electron atoms