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Catalyst – October 9(3), 2009

Catalyst – October 9(3), 2009. Tuesday Mystery Element! (write it on Monday) This element is easily magnetized. It is important for human nutrition by preventing anemia. Can become radioactive and emit gamma rays (can treat cancer). Don’t forget your Weekly Goal!.

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Catalyst – October 9(3), 2009

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  1. Catalyst – October 9(3), 2009 Tuesday Mystery Element! (write it on Monday) • This element is easily magnetized. • It is important for human nutrition by preventing anemia. • Can become radioactive and emit gamma rays (can treat cancer). Don’t forget your Weekly Goal!

  2. Catalyst – October 9(3), 2009 Tuesday Mystery Element! • This element is easily magnetized. • It is important for human nutrition by preventing anemia. • Can become radioactive and emit gamma rays (can treat cancer). COBALT!

  3. Today’s Agenda • Catalyst • New Groups! • Project Work Time (15 minutes ONLY) • Speed Dating! (15 minutes) • Intro to Covalent Compounds • Covalent Bond Formation (more LDS’s!) • Exit Question

  4. Projector Front Door 2nd Period Group 3 Chelsea J. Reshad, Antonio, Arethia Group 1 Neron, Denny, T’Keyah, Tre Group 2 Isaiah, Kerrie, Darren, Elesha Group 6 Joseph, Whitnie, Juan, Jenny, Isaac Group 5 Byron, Robin, Sidne, Nicolette Group 4 Timothy,Corian, Katty, Jenny Group 9 Group 7 Chelsea C., Jessica, Chris, Dorian Group 8

  5. Projector Front Door 3rd Period Group 1 Emanual, Antoinette, Derrick, Devone Group 3 Jonas, William, Jonathan, Bridget Group 2 Sean, Tynisha, Willie, David Group 4 Christian, Tonisha, Tierra, Thien Group 6 Jessie, Jalen, Mike, Maya Group 5 Justin, James, Jeremy

  6. Projector Front Door 4th Period Group 3 Anthony, Shant’a, Jayde, James Group 1 Lee, De’Jonnaie, Fatina, Katelynn Group 2 Brittanny, Duan, Darrionne, Phillip Group 6 Stephanie, Jordan T., Tashica, Kathy Group 4 Jordan J., Keyera, Brett, Queirra Group 5 Antrashion, Dajaelle, Cole, Brandon Group 7 Queirra, Kevin, Davida, Amanda Group 9 Brittany P., Kennesha, Kawanna Group 8

  7. Today’s Objectives • SWBAT find some atom love! • SWBAT state characteristics of covalent compounds. • SWBAT model single covalent bond formation.

  8. Project Work Time You have 15 minutes to finish your Personal Ads Project. Then we will SPEED DATE!!!

  9. Speed Dating • If you are an EVEN NUMBER, you will be stationary. Find a spot at a lab bench and stay there throughout Speed Dating. • If you are an ODD NUMBER, you will rotate CLOCKWISE to different dates.

  10. Covalent Compounds in da House! • Covalent compounds are EVERYWHERE! • Household cleaners (Ammonia) • Water! • Salad dressing • Political debate! (think greenhouse gases)

  11. Find the Characteristics of Covalent Compounds…. Let’s HUNT!

  12. Characteristics of Covalent Compounds(Key Point #1) • Electrons are shared • Bonds between nonmetals • Usually gases at room temperature (not crystals ) • Low melting points • Poor conductors of electricity

  13. What’s the difference between ionic and covalent compounds? • It is important to understand the differences between ionic and covalent compounds • Let’s review ionic compound characteristics…

  14. Characteristics of Ionic Compounds • Electrons are transferred • Bonds between metals and nonmetals • Make crystals • High melting points • Good conductors of electricity when dissolved

  15. Double Bubble Group Race! • Each group will complete a Double Bubble Diagram…liiiiiike this (Double Bubble doc) • Rules: • No talking or sharing of notes! • First person fills in ONE bubble and passes paper to next person – cannot skip people! • If next person doesn’t know an answer, he/she must stand up and do 10 jumping jacks before passing paper. • Next person fills in ONE bubble and passes paper to next person…etc!

  16. How do covalent bonds form? • Let’s look at Lewis Dot Structures again! • Key Point #2: Each atom in a compound satisfies the octet rule. This is shown in a Lewis Dot Structure.

  17. Single Bonds • Single covalent bond: one pair of shared electrons (two electrons) • Atoms may be the same • H2, F2, Cl2, Br2, I2, O2 • Atoms may be different • HF, HCl, HBr, HI =

  18. Formation of Single Covalent Bonds Examples H2 F2 HCl (chlorine)

  19. Formation of Single Covalent Bonds Your Turn! Cl2 HBr

  20. Tricks! • Central atom: in the center of a molecule, usually has lower electronegativity • Terminal atom: not in the center of a molecule Hydrogen will NEVER be a central atom!

  21. Formation of Multiple Single Bonds Examples NH3 SeCl2

  22. Formation of Multiple Single Bonds Your Turn! NF3 CH4 CH3Cl

  23. Practice Time – Finish for HW! • Draw the Lewis Dot Structures for the following covalent compounds: • Br2 • HI • PH3 • H2S • CCl4 • PH3 • SiH4

  24. Exit Question • What are 3 characteristics of covalent compounds? • What is one difference between ionic and covalent compounds? • Draw the Lewis Dot Structure for Cl2.

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