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15 Cards in this Set

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