2. 1 Properties of matter

3. 2 What are properties? Characteristics used to describe an object Ex: Odor density Shapesoftness size taste Texture smell Hardnessreactivity Flammabilityexplosive

4. Melting point Boiling point Vapor pressure Color State of matter Phase Texture Density Electrical conductivity Solubility Adsorption to a surface Hardness Shape Hardness Physical Properties

5. 4 What is a physical change? Physical changes involve the changing of physical properties Type of matter remains the same

6. The physical properties of sodium metal can be observed or measured. It is a soft, lustrous, silver-colored metal with a relatively low melting point and low density. Hardness, color, melting point and density are all physical properties.

7. Chemical properties describe how a substance change into another substance. For Example, Flammability

8. Reaction with acids Reaction with bases (alkalis) Reaction with oxygen (combustion) Reaction with other elements Decomposition into simpler substances Corrosion

9. 8 Chemical Changes The change of a substance into a new and different substance Also known as a chemical reaction