1. Do Now & Announcements Turn in lab from yesterday
Work on “Vapor Pressure Review”
Today:
Intermolecular Forces, Properties of Matter continued.
Unit 3 Review
Unit 3 Extra Credit Quiz TOMORROW

3. exothermic: release heat
Endothermic: require heat
boiling
condensation
sublimation
deposition
melting
freezing

4. 3. Intermolecular Forces
Forces of attraction between molecules
(dotted lines represents attraction between molecules)

5. Moving quickly, bouncing flowing
Tightly packed
Loose, but close
Spread far apart
Moving quickly, bouncing
Slow, vibrating in place
flowing
Definite volume
Definite volume
Volume can change
Definite shape
Shape can change
Shape can change

6. Intermolecular Forces & Phase of Matter
For the same chemical substance, molecules in the SOLID phase will have stronger intermolecular forces between them than molecules in the GAS phase
In order for a solid to change into a liquid (melt) or for a liquid to change into a gas (boil), the molecules must overcome the intermolecular forces holding them together.

7. Covalent (Molecular) Compounds
Properties of Solids
Ionic Compounds
Covalent (Molecular) Compounds
Metals
Made up of…
Electrons are….
Physical Properties:
________ melting point & boiling point
Solids ______________ conduct electricity
When dissolved in water: _______ conduct electricity
Solids _____________ conduct electricity
When dissolved in water: _____ conduct electricity
_______ melting point & boiling point
Solids _____ conduct electricity

8. Ionic Compounds Metal + Nonmetal Electrons are transferred
HIGH melting point & HIGH boiling point
Solids DO NOT conduct electricity
Ionic compounds dissolved in water DO conduct electricity (electrolytes)

9. Covalent Compounds 2 or more Nonmetals Electrons are shared
LOW melting point & LOW boiling point
Solids DO NOT conduct electricity
Covalent compounds dissolved in water DO NOT conduct electricity (nonelectrolytes)

10. Metals Made up several atoms of the same metal
Electrons are constantly moving
HIGH melting point and HIGH boiling point
Solids DO conduct electricity

11. Note
Metals are found to the left of the “staircase” on the periodic table
Nonmetals are found to the right of the “staircase” on the periodic table