CHEM 1211K Lecture Notes - Lecture 5: Electron Configuration, Periodic Trends, Bulgarian Lev
Document Summary
451: mendeleev (1834-1907, order elements by atomic mass , saw a repeating pattern of properties . Why: mendeleev "s periodic law allows us to predict what the properties of an element will be . Based on its position on the table . It doesn"t explain why the pattern exists . Quantum mechanics is a theory that explains why the periodic trends in the properties exist : and knowing why allows us to predict what. Boltzmann , bohr: the quantum numbers and. Electron configurations help us to understand why these patterns exist : electron configurations. # e le in each orbital } tf . In p orbitals: tells us about the distribution of all electrons in an atom , consists of : denoting the energy level . Letter denoting the type of orbital . l : superscript denoting the number of electrons. # e in each orbital: orbital diagrams in those orbitals .
