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5.1 Notes 1) Draw a picture of: a) the Rutherford model of the atom. 1911 Ernest Rutherford identified positive nucleus b) the Bohr model of the atom. c) the Schrodinger model of the atom. Where are subatomic particles? What was the problem with his model? 2) What was inadequate about Rutherford's model? Nov 78:03 AM 1913 Niels Bohr improved upon Rutherford's model Electrons found in specific orbits around nucleus Each orbit has fixed amount of energy Energy levels Higher energy levels quantum of energy (quantus = "how much") amount of energy needed to move an e‐ from one energy level to another *e‐ can exist in a specific energy level *cannot be between energy levels Nucleus The Quantum Mechanical Model It's all about probability... determines allowed energies of e and probability of finding e in locations around nucleus 1926 Schrodinger equationthis model of the atom is mathematical...all about probability There is no exact path of e around nucleus in QMM, likely to find e in a fuzzy cloud around nucleus Atomic Orbitals regions with high probability of finding e Energy levels named by principal quantum no. (n) # of Orbitals n2 Oct 2611:50 AM 2n2 = Maximum number of electrons that can occupy a principal energy level Electron Configurations Oct 2611:51 AM