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30 Cards in this Set

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metal + non-metal bond?
ionic
non-metal + non-metal bond?
covalent
equation for # shared pairs
SP = (1/2) [ER - VE]

ER = e- for octet
VE = valence e-
for polyatomic ions: (VE)
NH4^1+ --> subtract 1 from VE

SO4^2- --> add 2 VE
formal charge equation
FC = VE - (NB + 1/2BE)

NB = non-bonding e-
BE = bonding e-
σ molecular orbitals
*max e- density along internuclear axis

*can form σ bonds with p or s

single bond 1 σ
double bond 1 σ 1 Π
triple bond 1 σ 2 Π
Π molecular orbitals
*mix p (or d) orbitals that are parallel

*e- denisty greater betewen nuclei BUT above and below internuclear axis
rank bonds in polarity
single bond:
-weaker
-smaller bond E
-longer bond

triple bond:
-stronger
-larger bond E
-shorter bond
gas
random motion throughout container. molecules apart.
liquid
random motion throughout volume. molecules touching
solid
oscillation around fixed positions. "molecules" touching
Kinetic Energy (KE) equation
KE = (1/2)mv^2

v = avg. speed
m = mass

avg. KE = thermal temperature
ideal gas law
PV = nRT

pressure, volume, temp.
n= # of moles
as pressure ____, volume ____
as pressure goes up, volume goes down
as pressure ____, temp ____
as pressure goes up, temperature goes up
as volume ____, temp ____
as volume goes up, temperature goes up
if a molecule is nonpolar, it has _____ force(s).
If a molecule is nonpolar, it has dispersion force.
If a molecule is polar, it has ____ force(s).
If a molecule is polar, it has dispersion, dipole-dipole.
If a molecule is polar and has N-H, O-H, F-H bonding, it has _____ force(s).
If a molecule is polar and has N-H, O-H, F-H bonding, it has dispersion, dipole-dipole and hydrogen bonding.
If a molecule is symmetrical, it is _____.
If a molecule is symmetrical, it is NONPOLAR.
If a molecule is asymmetrical, it is _____.
If a molecule is asymmetrical, it is POLAR.
boiling occurs when _____.
boiling occurs when vapor pressure = external pressure.
as boiling point ____, vapor pressure _____.
As boiling point goes up, vapor pressure goes down.
to find the higher boiling point, you look at _____.
To find the higher boiling point, you look at the molecule's Lewis Structure. From the Lewis Structure you can find out whether or not it is symmetrical/asymmetrical. Then you can determine the different molecular bonds the molecule has. The more the bonds, the higher the boiling point. (the more the bonds, the lower the vapor pressure.)
Simple Cubic Unit Cell (SC)
*8 corners

corner atoms = 1/8 inside
Body Centered Cubic Cell (BCC)
*8 corners and a middle.

corner atoms = 1/8 inside.
body atom = all inside
Face Centered Cubic Cell (FCC)
*each face and corners

*face atoms = 1/2 inside
corner atoms = 1/8 inside

*best packing efficiency.
LESS void space
density = _____/_____
Density = mass/volume (length^3)
sodium chloride structure
coordination # 6. poor for packing equal sized spheres
cesium chloride structure
CsCl adopts this structure. The coordination # = 8