1. Intermolecular Forces
Attractive forces that hold together multiple particles
can hold together identical particles (Ex: water molecules attached to other water molecules)
can hold together different particles (Ex: cellulose in paper)
4 Types of IMF (weakest to strongest)

2. London Dispersion Forces
Attractive force that occurs between two adjacent particles that have a temporary or instantaneous dipole moment
dipole: occurs when the electrons position themselves on the same side of a particle creating a slightly negative end and a slightly positive end
Easier to occur with low temperatures and large particles

3. London Dispersion Forces
Found most commonly in:
Nonpolar covalent compounds (Ex: BH3)
Single atoms/elements (Ex: Ag)
Diatomics (Ex: Br)

4. Dipole-Dipole Force
Attraction between two adjacent polar molecules (has to be a covalent compound)
Created when the slightly + end of one molecule is attracted to the slightly – end of the other molecule
Ex: HCl

5. Hydrogen Bond
Specialized dipole-dipole the occurs between two FON (fluorine, oxygen, and nitrogen) molecules
Ex: Water

6. Ion – Ion (Ionic)
Attraction between two adjacent ionic compounds where the positive end of one compound is attracting the negative end of another
Ex: NaCl

8. London Dispersion
Dipole – Dipole
Hydrogen
Ionic
MgCl2 H2
H2S HF
BeH2
Li2CO3 Rn