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15 Cards in this Set
- Front
- Back
What are some activities that Geometry plays a role in ?
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structural integrity of materials, polarity and attraction between molecules, physical states, absorption of light, biochemical reactions and drug behavior
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If a molecule has an area of electron density of 2, such as Co2, what is the name of the EDG?
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linear
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If a molecule has an area of electron density of 3, such as BH3, what is the name of the EDG?
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trigonal planar
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If a molecule has an area of electron density of 4, such as CH4, what is the name of the EDG?
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Tetrahedral
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What are some characteristics of elements in the 3rd row and beyond that make them vulnerable to expanded octets?
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They are relatively large (leaving more room for extra bonds of lone electron pairs), They have empty d-orbitals close in energy to the p-orbitals, they attract small, highly electronegative atoms.
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What is the process called that helps move electrons from s subshells to d subshells?
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HYBRIDIZATION
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If a molecule has an area of electron density of 5, such as PCl5, what is the name of the EDG?
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Trigonal Bipyramidal
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If a molecule has an area of electron density of 6, such as SF6, what is the name of the EDG?
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Octahedral
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What is Electron Domain Geometry?
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The arrangement of ALL areas of electron density (bonds and lone pairs) around the central atom.
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What is Molecular Geometry?
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The arrangement of ONLY bonded atoms around the central atom.
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Do lone pairs or bonded atoms have a larger negative charge?
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LONE PAIRS
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In Trigonal bipyramidal shaped molecules, the lone pairs must occupy _______positions first because there is more room for the larger negative charge.
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Equitorial
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In tetrahedral, trigonal planar, and linear EDG"s, the lone pair can go anywhere. True or False?
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True
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In Octahedral EDG's, the first and second lone pair can go anywhere. True or False?
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False, the first can go anywhere, the second pair will occupy the opposite end of the molecule.
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What are the steps to determine polarity?
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1. Determine the molecular geometry
2. Draw dipole moment vectors for each bond. 3. Determine overall (net) effect of all dipole moments combined. |