Matter All matter has 2 types of properties: Physical properties and chemical properties.

Melting/Boiling Point Malleability Elasticity Physical properties Definition: Can be observed without changing the substance into another substance. Color Shape Odor Density Melting/Boiling Point Malleability Elasticity

Reacts with a base to form water Chemical properties Definition: Indicates how a substance reacts with something else; the substance is chemically changed when observing it. Combustibility Flammability Ability to rust Reacts with a base to form water

Examples of chemical properties include: The ability to burn Ability to tarnish Ability to rust Ability to decompose Ability to react with other chemicals Instability Ability to do acid/base reactions

Graphic organizers Graphic organizers are visual representations of knowledge, concepts or ideas.

React with a BASE to form water Chemical Properties Flammability Combustibility React with a BASE to form water Ability to rust

Chemical Change When pure substances mix and change into entirely new/different substances. Color change Heat or light is given off Gas Production (not from boiling) (ex: fizzing) Odor change Precipitate (e.g. powder) forms Usually irreversible Energy Change (usually seen as a temperature change)

Heat or light is given off Gas production (not from boiling) Chemical Change Color change Heat or light is given off Gas production (not from boiling) Odor change Precipitate forms (ex: powder) Usually irreversible Energy change (raise or lower temp.)

Which clue(s) tells you these are chemical changes? Examples: 1.Bleaching hair 2.Frying an egg 3.Fireworks exploding 1. 2. 3.

Physical Properties of substances Definition: Can be observed without changing the substance into another substance. Color Shape Odor Density Melting/Boiling Point Malleability Elasticity

Melting/Boiling Points Physical Properties Color Malleability Shape Elasticity Odor Density Melting/Boiling Points

Shape changes (crinkling, tearing) Size changes (crushing, smashing) Physical Change Definition: A change in which matter changes form, but does not change composition. (an appearance change only) Change state (solid, liquid, gas) Shape changes (crinkling, tearing) Size changes (crushing, smashing) No color change (except when dye added) Dissolving

Change in state (solid, liquid, gas) Physical Change Change in state (solid, liquid, gas) Shape changes (crinkling, tearing) Size changes (crushing, smashing) Dissolving

Which clue(s) tells you these are physical changes? Examples: 1.Glass breaking 2.Butter melting 3.Chopping wood 1. 2. 3.

Check for Understanding Given the particle diagram to the RIGHT representing four molecules of a substance: Which particle diagram best represents this same substance after a physical change has taken place? A chemical change? Hint: How do we know that a chemical change has taken place?

Metals vs. Nonmetals Comparison Chart Shiny Dull (not shiny) Malleable/bendable Brittle/fragile/breakable Conducts electricity Not a conductor of electricity Reacts with acid No reaction with acid Usually solid at room temperature Can be solid, liquid, or gas at room temperature

Independent practice

Exit Slip 1. Which statement describes a Physical Property that can be used to distinguish between compound A and compound B? a) A rusts after 10 minutes, and B rust after 30 days b) A does not corrode in acid, and B does corrode in acid. c) A takes 30 kilojoules of energy to combust, and B has a takes 100 kilojoules of energy to combust. d) A is a blue solid, and B is a white solid.

Exit Slip 2. Which statement describes a Chemical Property of Sodium? a) Sodium has a melting point of 97 ⁰C. b) Solid sodium is white. c) Sodium combusts when introduced to water. d) Solid sodium has a crystal lattice structure.

Exit Slip 3. The table below depicts the property of matter along with a descriptive characteristic. Which of the following are correctly paired? Scenario Property A Baking soda and vinegar bubble and fizz when combined Physical B A solid forms when liquid lithium bromide and liquid silver nitrate mix Chemical C A bicycle chain left outside for a year rusted D The density of water is 1 g/cm3

4. Which of the following rows reflect properties of a metal? Exit Slip 4. Which of the following rows reflect properties of a metal? Breaks easily Reacts with an acid Dull in appearance Does not conduct electricity

Complete any class activities that were not completed during class. HOME LEARNING Complete any class activities that were not completed during class.