105 F11 Lecture 21 cmpd

105 F11 Lecture 21 cmpd - Chemistry 105 Its National...

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Chemistry 105
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It’s National Chemistry Week!
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Molecular shape
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Water
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Carbon Dioxide
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Polar or Non-polar?
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The molecule PCl3 is: A) Polar B) Non-polar HINT: 1. Draw Lewis structure 2. Determine electronic and molecular geometry 3. Examine dipoles and overall dipole
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Geometry origins arise from these shapes? How do these shapes:
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Valence Bond Theory Lewis theory is about electron pairs. Using atomic orbitals overlap, we better understand bonding and geometries. What happens when atomic orbitals mix?
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Orbital Overlap Stable More Stable Less Stable Energy - Energy +
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Overlap and Bonding Covalent bonds (“sharing”) form through the overlap of electron orbitals on adjacent atoms. H2 HCl Cl2
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Hybrid Orbitals BeF2 Beryllium: All electrons are paired. If energy is absorbed so that an electron is promoted from 2 s to 2 p , Be can form two bonds.
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Mixing s and p orbitals yields “hybrid” orbitals of the two original orbitals. “sp
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This note was uploaded on 02/28/2012 for the course CHEM 105 taught by Professor Macedone during the Fall '07 term at BYU.

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105 F11 Lecture 21 cmpd - Chemistry 105 Its National...

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