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VSEPR Model
Pi and Sigma
Bonds and diagrams
Molecular Shapes
?Potpourri
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$400 $400 $400 $400 $400 $400
$600 $600 $600 $600 $600 $600
$800 $800 $800 $800 $800 $800
$1000 $1000 $1000 $1000 $1000 $1000
Final Jeopardy
Final Jeopardy “types”
Final Jeopardy
•Categorize the bond strengths and lengths of double, triple and single
bonds.
Triple-shortest/strongest—single longest/weakest—double in between
$200Trigonal Pyramidal, Tedrahedral
State the molecular geometry and then the electron
geometry of Phosphorus tri hydride
$400
2-2-0, linear, sp
What is the “count” and shape and hybridizaton of
CO2 below
$600B—4-2-2—bent-- sp3
Which is correct below? What is the “count”,
hybridization, and shape?
$800
Electrons will spread themselves as far apart as possible for bonding making
predictable shapes.
What is the purpose of VSEPR .
$1000 3-3-0--- sp2---trigonal planar
What is the “count”, hybridization, and shape?
$200
7 sigma and 0 pi
How many sigma and pi bonds?
$400
sigma
What kind of bond?
$600
Double and Triple
Which type of bonds cannot “spin”?
$800
question
How many sigma and pi bonds?
5 sigma and 1 pi
$1000
3 sigma and 2 pi
question
How many sigma and pi bonds?
$200
MG = shape of molecules
EG=includes unpaired set of electrons.
What is the main difference between molecular and
electron geometry
$400
Pz
In a double bond, which orbital is labeled as the pi
orbital.
$600
3 bonds- 1 sigma, 2 pi
Describe a triple bond in terms of pi and sigma.
$800
H-C=C-H
Draw 2 carbons with a triple bond, show hydrogens
$1000
•Using an arrow diagram, show the bonding atoms of C
and then show them hybridized.
$200
220 and linear
What is the “count” and molecular shape of BeCl2
$400
120 degrees
What is the angle between atoms in a trigonal planer
molecule?
$600
2 bonded and 2 unbonded
How many bonded and unbonded pairs of electrons
in water?
$800
Valence Pair Electron Pair Repulsion (theory)
What do the letters VSEPR stand for?
$1000
48 electrons and 6 bonds
How many electrons (total) and bonds in SF6
$200
Ethyne, acetylene
Give two names for this compound
$400
Single bond, covalent, because of overlapping orbitals.
Define: Sigma Bond
$600
5-2-3
What is the “count” for this molecule?
$800Trigonal pyramidal, 4-3-1---tetrahedral, 4-
4-0---Trigonal planar, 3-3-0---bent, 4-2-2---linear, variable depending upon the atom
Name the molecular shape and count starting from
upper left-clockwise. Do not use your notes.
$1000
no resonance
Finish this diagram and does it do resonance?
$200
Shielding, farther down from top of table
Why can Xe make bonds with F?
$400
NOFClBrI
Name the Boot elements
$600
$800
Dalton, Thompson, Rutherford and Bohr…Schrödinger, and Heisenberg,
Name the 1st five scientists in “The Atom Song”
$1000
1s2 2s2 2p6 3s2 3p2 and [Ne] 3s2 3p2
Long and short electron configuration for silicon.
Daily Double
sp3
What is the hybridization of PCl3
The Jeopardy champion!