Quiz You have 10 minutes Write your name

Quiz: You have 10 minutes! Write your name, today’s date Nov. 19, and your homeroom section! Write down elements #1 -10, their symbol, and the correct spelling for each.

Do Now: November 19 1. What are the group(s) of elements that are always brittle and nonmalleable? 1. What are the group(s) of elements that are shiny? 1. Compounds can be broken down only be _____ changes. 1. Is Na. Cl an element or compound? 1. Is K an element or compound?

Announcements Tonight for homework: Mixtures Packet Elements #11 -20 test Friday!!! Project due Tuesday, Dec. 3

Today’s Objectives SWBAT define mixture SWBAT identify examples of a mixtures and compounds. SWBAT describe how the characteristics of a compound are different than the characteristics of their component parts. SWBAT compare and contrast elements, compounds, and mixtures.

Compounds Two or more different elements are chemically joined.

Compounds When they are chemically combined, new chemical bonds form between them

Compounds The characteristics (properties) of a compound are different than the characteristics (properties) of their component parts (of the elements that make them up)

Compounds A compound is a completely new substance or product

Compounds have a definite ratio. If I change the ratio, I completely change the properties of a compound. CO 2 -Carbon Dioxide CO-Carbon monoxide

Compounds Recap Two or more different elements are chemically joined When they are chemically combined, new chemical bonds form between them The characteristics (properties) of a compound are different than the characteristics (properties) of their component parts (of the elements that make them up). A compound is a completely new substance or product Compounds have a definite ratio. If I change the ratio, I completely change the properties of a compound.

Examples of Compound Salt (Na. Cl), water (H 2 O), glucose (C 6 H 12 O 6) Silver and sulfur combining to form silver sulfide

Brain. POP: mixtures

Mixtures Two or more substances are physically combined The substances in a mixture retain (keep) the properties that they originally had Physical properties can change, but there is no new substance that is formed No new chemical bonds are formed Can be easily separated into distinct parts

Examples of Mixtures Salt water Trail mix Granite Sand Soil Concrete Salad dressing

Two Types of Mixtures Heterogeneous Mixture A mixture that does not appear the same throughout Hetero=different Examples: milk and cereal Chex mix Pizza Homogenous Mixture A mixture that appears the same (uniform) throughout Homo=same Examples: Salt water coffee blood

Compound or Mixture? Food coloring in water

Compound or Mixture? Peanut butter and jelly sandwich

Compound or Mixture? Fructose, a fruit sugar found in many plants

Compound or Mixture? Sulfur dioxide combines with water to form acid rain

Compound or Mixture? Oil and water

Exit Ticket: Write the answers ONLY! 1. How is a compound different from a mixture? A. mixtures are created through physical changes; compounds are created through chemical reactions B. compounds are created through physical changes; mixtures are created through chemical changes C. mixtures, on average, are heavier than compounds D. compounds, on average, are heavier than mixtures 2. What is always true of a mixture? A. it is always thicker than the two chemicals that go into it B. it retains the properties of the substances that make it up C. it can never be separated into its original substances D. it is produced through chemical reactions