Lect+30+08 - Week 12 Atoms and Orbitals Reading CHAPTER 5...

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Week 12 Atoms and Orbitals Reading CHAPTER 5 Week 13 Molecular Structure and Orbitals Reading CHAPTER 6 Week 14 - Interactions of Molecules with Light Reading CHAPTER 20 sections 20.1-20.3
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Atoms and Orbitals During this lecture we will discuss a common language understanding of electron orbitals and associated quantum number in atoms One electron orbitals Energy levels and quantum numbers n, l, m l Orbital shapes and probability distributions Approximations for multiple electron orbitals Shielding Building up the periodic table.
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Three dimensions - use spherical coordinates to model electron behavior
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Quantum numbers for three dimensional electron orbitals “n” - principle quantum number - size of orbital - n 2 sets of quantum numbers for each n. n = 1, 2, 3, 4,… “l” - angular momentum quantum number - shape of orbital l = 0, 1, 2,… n-1 l = s, p, d, f,…n-1 • “m l ” - magnetic quantum number - direction of orbital relative to magnetic field - for each l there are 2l+1 orbitals m l = -l, -l+1, …0,… l-1, l
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