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Chemistry ‘S’ – Atomic Orbitals and Quantum Numbers I Quantum Numbers – specify the __________ of atomic orbitals and the ___________ of electrons in orbitals Set of ______ - Like the address of an electron 1. Principal 2. Angular Momentum (Pages 108 and 109 in text) 3. Magnetic 4. Spin II Electron Configurations The ____________ of electrons in an atom 1. Regular 2. Shorthand (Noble Gas) 3. Orbital Notation 4. Electron Dot Notation Rules Governing Electron Configurations 1. Aufbau Principle – electrons occupy the ________ energy level available 2. Pauli Exclusion Principle – no two electrons in the same atom can have the _______ _______ of four quantum numbers 3. Hund’s Rule -electrons occupy orbitals _______ at a time before a second electron is added -all electrons in singly occupied orbitals must have the _______ spin Configuration Examples Using Chart (in notes)