Manfra24-2011 - CHAPTER 10 Molecules and Solids 10.1...

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10.1 Molecular Bonding and Spectra 10.3 Structural Properties of Solids CHAPTER 10 Molecules and Solids Molecules and Solids Johannes Diderik van der Waals (1837 – 1923) “You little molecule!” - Fred Flintstone (insulting his friend Barney Rubble)
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If j and m j are quantum numbers for the single-electron hydrogen atom: Quantization of the magnitudes: The total angular momentum quantum number for the single electron can only have the values Total Angular Momentum
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Spin-Orbit Coupling An effect of the spins of the electron and the orbital angular momentum interaction is called spin-orbit coupling . is the magnetic field due to the electron’s orbital motion. where α is the angle between . The dipole potential energy The spin magnetic moment
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Total Angular Momentum Now the selection rules for a single-electron atom become Δ n = anything Δℓ = ±1 Δ m j = 0, ±1 Δ j = 0, ±1 Hydrogen energy-level diagram for n = 2 and n = 3 with spin-orbit splitting.
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Hund’s rules : The total spin angular momentum S should be maximized to the extent possible without violating the Pauli exclusion principle. Insofar as rule 1 is not violated, L should also be maximized. For atoms having subshells less than half full, J should be minimized. For a two-electron atom
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This note was uploaded on 04/23/2011 for the course PHYS 342 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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Manfra24-2011 - CHAPTER 10 Molecules and Solids 10.1...

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