5.7; Bohr model, 1.5; degeneracy, 5.5; energy levels, 5.5; fine structure, 18.2; ground state, 5.5; orbitals, 5.6; quantum numbers, 5.5; radial equation, 5.4; selection rules, 21.4; spectrum, 5.7; *hydrogen.py*; capstone simulation, 38 Hyperfine structure, 18.3