1. Properties: Chemical or Physical
How Can We Tell?

2. Physical Properties
Any property that can be observed or measured without forming a new substance
They describe the particles
Can be broken down into Qualitative and Quantitative properties
Qualitative Physical Property: can be described but not measured
Quantitative Physical Property: can be measured numerically

3. Qualitative Physical Properties:
Color
Texture
Taste
Smell
State
Crystal Shape
Malleability
Ductility

4. Quantitative Physical Properties:
Melting temperature
Boiling temperature
Density
Viscosity
Solubility
Electrical Conductivity
Heat Conductivity

5. Chemical Properties:
Any property that describes how a substance reacts when forming a new substance
Describe the behavior of the particles in the presence of other particles

6. Types of Chemical Properties:
Reacts with water
Reacts with air
Reacts with pure oxygen
Reacts with acids
Reacts with other pure substances
Toxicity
Stability
Combustibility

7. Note:
Understanding the difference between chemical and physical properties can help you determine if a chemical or physical change has taken place

8. Examples: Copper reacts with substances in air to form a green coating
This coating is known as Patina by artists

9. Other Examples: Gold is malleable Iron melts at
It can be hammered into thin sheets and different shapes
Iron melts at
This is extremely high
Sulfur reacts with oxygen to form sulfur dioxide