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chapter 7 quiemica

chemistry

QuestionAnswer
When an s electron is promoted to an empty p orbital forming new equivalent orbitals.? Orbital hybridization
Orbital hybridization is used to? create equal bonding sites that require all equal amounts of energy.
Creates 2 bonding sites? SP hybridized
creates 3 bonding sites? sp^2 hybridized
creates 4 bonding sites? SP^3 Hybridized
Vespr theory stands for? Valence shell electron pair repulsion theory
what does the vespr theory state? it states the 3-d shape of the bonds and atoms in a molecule. based on the fact that negative charges repel one another.
The repulsion of the negative regions of a molecule create? specific 3-d shapes
negative regions : Lone pair of electrons, a simple, double, or triple bond.
Lone pairs and bonds will move as far a part as possible? true or false? True!!!! :)
Practice your Lewis structures,Kyle! No you robot! you don't control me!...
Are sigma bonds stronger than pie bonds? yes
disadvantages of lewis structures? they do not show 3-d shape
Valence Bond theory? Covalent bonds are formed when different atoms overlap.
Sigma bond? Bond formed by orbitals that overlap directly between the nuclei of the atom
Pi bond? Bond formed by orbitals that overlap above and below the nuclei of 2 atoms
single bond =? one sigma bond
double bond? one sigma and one pie bond.
triple bond? one sigma and 2 pie bonds.
What bond is the strongest? triple bond
instead of oscillating between 2 possible bond configurations, the bonds take on an intermediate character. Resonance
Octet exception 1. molecules with an odd number of valence electrons.
octet exception 2. some elements are content with fewer than 4 pairs of electrons ex. boron likes 6
octet exception 3. more than 8 valence electrons can be shared with a central atom.
Molecular orbital theory? orbitals are replaced by totally new orbitals when molecules are formed.
what are anti bonding orbitals? they consist of electrons that interfere with each other and they require more energy then atomic orbitals.
A central atom surrounded by 4 electron regions? (shape)? Tetrahedral
A central atom surrounded by 3 electron regions? Trigonal Planar
A central atom surrounded by 2 electron regions? Linear
a central atom surrounded by 3 bonds and a lone pair of electrons? Pyramidal
A central atom surrounded by 2 bonds and 1 or 2 pairs of electrons? Bent
Do bonds in diatomic molecules have polarity? No!
Bonds where electrons are not shared equally are called? Polar covalent bonds
Review : Bonds between elements are partially? ionic and covalent
Partial charges are shown with what symbol? lower case delta
In general symmetric molecules are non-polar while asymmetrical molecules are polar? true!
Bent and pyramidal always produce polar molecules when they contain polar bonds? yes.
Tetrahedral,Trigonal planar,and linear are ----?. If their outer atoms are different they are ----?? non-polar;polar
The size and direction of a molecules total polarity? Dipole moment
Created by: Kyle Witt