Ch 10,11 Flashcards
Order of intermolecular forces from lowest to highest
London dispersion
Dipole dipole
Hydrogen bonding between H and N,F, and O
Ionic
Definition of Electronegativity
Tendency to attract the electrons in a bond.
Pauling
Fluorine is most electronegative
Nonpolar Definition
Polar Definition
- Cancel to zero
- Doesn’t cancel
Opposite signs attract. Same signs repel. It will turn away until the positive end touches the negative end.
Intramolecular force
Intermolecular force
-
-Between molecules
Boiling Points
Increase as you go down the periodic table.
Stronger forces have higher boiling points.
Freezing points
Aka
Crystalline solids
When water crystallize into I’ve they pack into a crystal, honeycomb shaped structure.
Weak force can liquefy noble gases
.
Amorphous Solids
Atoms aren’t arranged in 3d array.
Ex. Glass plastics rubber
Crystalline
Lattice
Three types of cubic atoms
Simple 1 atom
Body centered 2 atoms
Face centered 4 atoms Ex. Cu
Waves curve at the same place to
If they don’t curve in the same place to
They become constructive, additive.
They become destructive.
Bragg Construction Equation
N(wavelength)= 2d(sin theta)
What is the Coordination number?
The number of atoms am atom touches
What type of atom has the higher coordination number?
Closest packing
Body
Face
Edge
Corner
1 atoms mass worth
1/2
1/4
1/8
X ray diffraction
.
Vapor Pressure
If the h20 molecules posses enough energy they will cut through the surface to the vapor.
H2o molecules are attracted everywhere but the top.