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Investigation 9

Investigation 9. Date : 10/30 LT: I can explain the relationship between elements and compound. Sponge: Throwback! How many different kinds of elements are in H O. To do…. Return Quiz. Part 1. What is an atom? Place magnets on board. These magnets are sample models of atoms!

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Investigation 9

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  1. Investigation 9 • Date: 10/30 • LT: I can explain the relationship between elements and compound. • Sponge: Throwback! How many different kinds of elements are in H O.

  2. To do… • Return Quiz

  3. Part 1 • What is an atom? Place magnets on board. • These magnets are sample models of atoms! • All substances are made of elements. Particles of elements combine to make all substances. The basic particles of elements are called atoms. • Each element has its own unique atom. I have put representations of several different atoms here on the board. Here is a hydrogen atom, a carbon atom, an oxygen atom, a sodium atom, and so on. Every element in the periodic table has its own unique atom.

  4. Part 1 • Here is a new particle. Make several combinations. • How many atoms have combined? • How many kinds of atoms are there?

  5. Part 1 • When two or more atoms of the same kind combine, the substance is an element. Any substance that is make of only one kind of atom is an element. Make several examples on the board.

  6. Part 1 • Here is another particle made of three atoms. How many different kinds of atoms are in this particle? Make on board. • This is a representation of a water particle. It is a combination of 2 hydrogen and 1 oxygen atom. Any particle made of two or more different kinds of atoms is a compound. Make on board.

  7. Part 1 • I’m going to make several different combinatinons on the board. You tell me – is it an element or a compound?

  8. Part 1 • This is the chemical formula for water. The chemical formula for a substance tells us the number and kind of atoms in one particle of a substance. This formula tells us that one water particle is made of two hydrogen atoms and one oxygen atom.

  9. Part 1 • Turn to notebook page 49. • How many of the substances are compounds? How do you know? • Turn to notebook page 37. • How many of the substances are compounds? How do you know?

  10. Add to your index… • Atom: basic particles of elements • Element: substance made of two or more elements of the SAME KIND • Compound:substance made of two or more DIFFERENT elements

  11. Part 1 • There are two kinds of compounds. If the particles are connected with a strong bond, the particles is a molecule. If the particles are connected with a weak bond, the particle is an ionic compound.

  12. Copy in your index… • Molecule: compound with a strong bond • Ionic compound: compound with a weak bond • Bonds: force holding atoms together

  13. Part 1 • Answer these on NB 147. • 1. What are the basic particles from which all matter is made? • 2. What is a compound? • 3. What kinds of particles are made of 2 or more kinds of atoms? • 4. How are molecules and ionic compounds different? • 5. What is a particle? How many kinds are there?

  14. Part 1 • Answer these on NB 147. • 1. atoms • 2. 2 or more different atoms • 3. molecules and ionic compounds • 4. strength of bonds • 5. basic unit of a substance, atoms, compounds, molecule, ionic compound

  15. Part 1 • Lets use stickers to represent atoms! • As you work through the assembly line, grab one of each sticker color. They’ve already been cut apart for you! • Turn to NB page 147.

  16. Part 1 • Write the letters on the colored dots: • Blue: H • Orange: C • Red: O • Green: Cl • Yellow: Na

  17. Part 1

  18. Part 1 • Go back to the chart and under the substance name, write element or compound.

  19. Investigation 9 • Date: 10/31 • LT: I can explain and give examples of a chemical reaction. • Sponge: List the atoms and how many of each are in this formula.

  20. To do…

  21. Part 1 • Notebook page 149 • Refer back to NB page 37 for the substance names and formulas!

  22. Elements and Compounds Practice Worksheet

  23. Elements and Compounds Practice Worksheet

  24. Elements and Compounds Practice Worksheet

  25. Elements and Compounds Practice Worksheet

  26. Elements and Compounds Practice Worksheet

  27. Elements and Compounds Practice Worksheet

  28. Investigation 9 • Date: 11/5 • LT: I can explain and give examples of a chemical reaction. • Sponge: is this a compound or element?

  29. To do… • Agenda • Guest visitors tomorrow

  30. Part 2 • I want to take a second look at gases and bubbles today. The first thing I want to do is bubble some air through this solution called limewater. Limewater is a saturated solution of calcium hydroxide. Calcium Hydroxide is a new substance. Its formula is Ca(OH) . • Lets make a model of the substance with our magnets.

  31. Part 2 • Lets watch the demo on fossweb.com! • After the hand pump: • Did anything happen? Did you notice any change in the limewater when we bubbled room air through it? • After blowing in to it…

  32. Part 2

  33. Part 2 • Review the reaction… • What happened when air was pumped through the limewater? • What happened when exhaled breath was blown through? • What caused the change? • What was different about exhaled air that produced a reaction?

  34. Part 2 • NB page 153. Don’t write until I do! Clear your desk of everything but your NB and your tiles. You and your partner share a bag and make one model.

  35. Part 2 • When a reaction occurs, the atoms of the starting substances rearrange to form new substances. • Starting Substances: Reactant • New Substances: Product • So…you can’t add tiles, you can’t take away tiles, you can only use the tiles in the reaction!

  36. Part 2 • !

  37. Part 2 • !

  38. Part 2 • Notebook page 155, Green Book page 63 – 68 • Answer the questions as you read!

  39. 1. What is destroyed and what is created ruing chemical reactions? • Nothing is created and nothing is destroyed! Atoms are rearranged in to new substances.

  40. 2. What are reactants and products? Write a reaction equation and label the reactants and products. • The starting substances are the reactants. The ending substances are the products.

  41. 3. Write the equation for the reaction between hydrogen and oxygen. Use chemical formulas for the substances.

  42. 4. Methane is the main gas in natural gas. The products that form when methane burns are carbon dioxide and water. Write a balanced equation showing the combustion reaction when methane and oxygen react.

  43. Investigation 9 • Date: 11/7 • LT: I can explain and give examples of a chemical reaction. • Sponge: List the reactants in the equation below.

  44. To do….

  45. Part 3 • Review from yesterday… • Yesterday we bubbled carbon dioxide into limeater. Did a reaction occur? How do you know? • What were the reactants? • What were the products?

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