Lec-10-Chap-07-2

Lec-10-Chap-07-2 - Lecture 10 Electron Configuration and...

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1 Lecture 10 Electron Configuration and the Periodic Table Quantum Numbers, Energy Levels, and Orbitals 7.5 Shapes of Atomic Orbitals 7.6 Atom Electron Configurations (I) 7.7 Lecture 10, Knowledge and Skills • Quantum numbers, n, l, m l , m s • Significance of quantum numbers • Orbital shapes, s, p, d, f • Internal orbital structures (nodes) • Relative orbital energies • Pauli exclusion principle • Hund’s rule • Electron configurations of many-electron atoms Quantum Numbers Principal quantum number, n ( n = 1, 2, 3, … ± ) Azimuthal quantum number, quantum number, l ( l = 0 to n ± 1) Angular momentum quantum number Magnetic quantum number, m l (m l = – l to + l ) Quantum Numbers Principal quantum number, n ( n = 1, 2, 3, … ± ) • Most important in determining the orbital energy • Defines the orbital size (average distance of electron from nucleus) • Orbitals with equal n are in the same shell Quantum Numbers l 012345. . . Code spdf gh ... Angular momentum quantum number, l ( l = 0 to n ± • Defines the shape of an orbital • Orbitals with equal l (and equal n ) are in the same subshell • Code letters identify l Example: List all l for an n = 1-4 Quantum Numbers Magnetic quantum number, m l (m l = – l to + l ) • Defines the orientation of the orbital Example: Example: List all sets of quantum numbers for an n = 3 e - l
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Lec-10-Chap-07-2 - Lecture 10 Electron Configuration and...

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