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Modern Electron Configuration. Three concepts which guide electron configuration: Aufbau Principle - e’s will occupy lowest energy orbital available Pauli’s Exclusion Principle - a maximum of 2 e’s can occupy a single orbital
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Modern Electron Configuration • Three concepts which guide electron configuration: Aufbau Principle- e’s will occupy lowest energy orbital available Pauli’s Exclusion Principle- a maximum of 2 e’s can occupy a single orbital Hund’s Rule- e’s with the same spin must occupy an orbital of equal energy before additional e’s with opposite spins can occupy the same orbital
Types of Configurations Longhand Noble gas Shorthand Orbital Spin Diagram Lewis Dot Diagram