Properties: Chemical or Physical How Can We Tell?

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

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

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

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

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

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

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

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