1. WARM-UP #1 Complete the following Element #protons (AN) #electrons
Mass
#neutrons
(M-AN)
Barium
(Ba)
Potassium
(K)
Sodium
(Na)

2. WARM-UP #2 How many atoms of each element in the following compounds?
1) hydrogen phosphate - 2H3PO4
2) diethyl sulphate (C2H5)2SO4

3. Physical and Chemical Properties

4. Physical Properties Characteristics of a substance
State (solid liquid or gas0
Colour
Clarity (opaque translucent or transparent)
Example, describe the physical properties of a ceiling tile:
Solid white, opaque, brittle, not ductile

5. Chemical Properties
Characteristics of a substance when it changes to a new substance
Examples
Hydrogen is explosive
HCl is Corrosive
Sodium is very reactive in water

6. Physical Change
A physical change is a change in a material that does not change the materials properties. The atoms vibrate more or less sot hey move further apart or closer together
Evidence of a physical change
Change in temperature
Change in state
Change in form

7. Chemical Change
During a chemical change a new substance is formed. The electrons of one atom transfer to another atom or the electrons are shared by the atoms. It is harder to reverse than a physical change
Evidence
Change in colour
Bubbles of gas produced
Precipitate formed
Heat produced
Light produced

8. Classify each as physical or chemical
Colour  physical
Flammability  Chemical
State  physical
Boiling point  physical
Malleability  physical
Reaction with water  chemical
Flash point  lowest temp at which a liquid can form an ignitable moisture in air near the surface of the liquid, lower flash point equals easier to ignite. physical
Solubility physical
Conductivity physical

9. Safety Systems

10. HHPS Hazardous Household Product Symbols On products found at home
Poisonous, flammable, explosive, corrosive
Simple

11. WHMIS Workplace Hazardous Materials Information System
On all products containing hazardous substances in all workplaces
8 symbols all in circles for different hazards
Can also have written cautions

13. MSDS Material Safety Data Sheet In all workplaces for every product
No symbols
Lots and lots and lots of information!