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#4 - Announcements Watch out for new Homework Assignments...

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Announcements: Watch out for new Homework Assignments on ARIS (Chapter 10). Problems with the Clickers (people not registered yet; damaged results from the computer crash). Lecture Notes on WebCT.
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The last lecture’s coverage: Molecular geometry by VSEPR (10.1) Dipole moments of simple and complex molecules (10.2)
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Objectives for today: Valence Bond Theory and Hybridization (10.3, 10.4, 10.5) Experimental demonstration of the paramagnetic property of liquid oxygen. Molecular Orbital Theory and Delocalization (10.6, 10.7, 10.8)
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Bond Dissociation Energy Bond Length H 2 F 2 436.4 kJ/mole 150.6 kJ/mole 74 pm 142 pm Valence Bond Theory bonds are formed by sharing of e - from overlapping atomic orbitals. Overlap Of 2 1s 2 2p How does Lewis theory explain the bonds in H 2 and F 2 ? Sharing of two electrons between the two atoms. 10.3 Molecular Orbital Theory formation of molecular orbitals from atomic orbitals.
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