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CHY 102 Final: CHY102: Exam notes: The Four Quantum Numbers

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CHY 102
Mehrab Mehrvar

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The Four Quantum Numbers Quantum Numbers are numbers that describe the quantum mechanical properties of orbitals 1. The Principal Quantum Number (n) 2. The Secondary Quantum Number (l) 3. The Magnetic Quantum Number (ml) 4. The Spin Quantum Number (ms) The Principal Quantum Number (n) Gives the main energy level or shell Describes the size and energy of an atomic orbital n can have any integer value greater than zero n = 1, 2, 3, 4, The Secondary Quantum Number (l) Gives the sublevel or subshell Describes the shape of the orbital: Sometimes called the Angular Momentum Quantum Number l can have any integer values from 0 to n1 e.g. n l 1 0 2 0,1 3 0,1,2 4 0,1,2,3 The energy of the orbital depends on l only in a multielectron case; for electrons with the same n, energy of l=1 < l=2 < l=3 Albert Michaelson worked with high resolution spectra and discovered
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