Today’s Agenda…

1. Today’s Agenda… • Bellringer: What is an atom? • Review • Notes on Elements and Compounds • Assignment: Frayer Model for Compound

2. Review • What is an atom? • What are atoms made up of? • Where are the protons, neutrons, and electrons located in the atom? • What kind of electrical charge do protons, neutrons, and electrons have? • What is the law of conservation of mass? • How is it related to atoms?

3. Elements & Compounds Study Pack #9

4. Today’s Target… • I can describe compounds.

5. What is an element? • An element is matter made up of only one kind of atom • All matter is made up of elements • Examples: oxygen and nitrogen are in the air we breath & metals like aluminum are used to make many products we use everyday like soda cans

6. The Periodic Table • A chart that organizes and displays all the elements • Elements are represented on the table with symbols • One capital letter OR one capital and one lowercase letter • Example: O: Oxygen & Al: Aluminum • What other information can be seen on the periodic table? • Atomic number • Atomic mass • Metal, nonmetal, metalloid • Solid, liquid, gas

7. What are compounds? • Made up of more than one kind of atom • Made up of more than one kind of element • Example: Water • H20 • Made up of the elements hydrogen and oxygen

8. What are compounds? • When the atoms (elements) that make up a compound come together a chemical change occurs • This means the elements cannot be separated from each other very easily

9. What are compounds? • Compounds are represented by formulas which include letters and sometimes numbers • These formulas tell us…. • What elements are in the compound • How many atoms of each element • Let’s try it! • What is NaCl made up of? • What is CO2 made up of?

10. Review • What is an element? • What is a compound? • How are they different?

11. Assignment • Finish the Frayer Model for “Compound” • Definition • Characteristics • Examples • Nonexamples