This chapter reviews atomic orbitals and the periodic properties of atoms. Understand the sizes, shapes, and relative energies of atomic orbitals and how they depend on quantum numbers Identify the nu...This chapter reviews atomic orbitals and the periodic properties of atoms. Understand the sizes, shapes, and relative energies of atomic orbitals and how they depend on quantum numbers Identify the number of radial and angular nodes in an atomic orbital Determine the ground state electron configuration and number of unpaired electrons for a given atom Explain periodic trends and their physical origins Thumbnail illustrates the electron density of a 3d orbital, generated with the Orbitron