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Do Now/ Catalyst

Do Now/ Catalyst. What ions would the following atoms form? Cl Mg K He Li P O. Do Now/ Catalyst. What ions would the following atoms form? Cl = Cl - Mg = Mg 2+ K = K + He = no ions formed Li = Li + P = P 3- O = O 2-. Introduction.

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Do Now/ Catalyst

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  1. Do Now/ Catalyst What ions would the following atoms form? Cl Mg K He Li P O

  2. Do Now/ Catalyst What ions would the following atoms form? Cl = Cl- Mg = Mg2+ K = K+ He = no ions formed Li = Li+ P = P3- O = O2-

  3. Introduction • Entrance Slip: Write your name and period at the top. • Answer the three questions under Day 2 ONLY. You may use your notes. • Why do atoms form ions? • What are cations and anions? • What charge ions would Ca and F be likely to form?

  4. Announcements Tardies/electronics Lab fees Office hours: Monday, Wednesday and Friday New homework policy – NO late work accepted BRING YOUR NOTES PACKET EVERYDAY! Entrance slips

  5. Types of Bonds Unit 3 Day 2

  6. Objective and EQ • SWBAT: • Explain how ionic, covalent, and metallic bonds are formed. • Explain the concept of “polarity.” • Explain the relationship between ionic, covalent, and metallic bonds and electronegativity, ionization energy, and the octet rule. • Essential Question: How do the properties of individual elements affect the types of bonds those elements form?

  7. Introduction: Real Life Example! PLASTICS!! Carbon and hydrogen bonded together makes plastic Bonds are Covalent

  8. Ionic Bonds Bonds between metals and non-metals where electrons are transferred.

  9. Ionic Bonds EN = Electronegativity

  10. Covalent Bonds Bond between non-metals where they share electrons.

  11. Covalent Bonds EN = Electronegativity

  12. Metallic Bonding ‘Sea of electrons’ freely move around fixed metal cations.

  13. Metallic Bonds EN = Electronegativity

  14. Types of Bonds

  15. Guided Practice What kind of bond do you think will be formed between each of the following? K and F I and Cl Many zinc atoms

  16. Polarity • Polarity refers to the distribution of electrons in a compound (how electrons are spread out). • When atoms with different electronegativities_ combine in a compound, electrons are not shared evenly. • The resulting difference in charge on the atoms is called a pole (dipole).

  17. Polarity cont. • There are three major ways electrons can be distributed in a bond: • Polar bonds are bonds where the electrons are not evenly shared. • Example: NaCl (Na-Cl bond) • Nonpolar bonds are bonds where electrons are evenly shared. • Example: F2 (F-F bond) • Polar Covalent bonds are somewhere in the middle. Electrons are distributed pretty evenly, but not perfectly. • Example: SiO2 (Si-O Bond)

  18. Polarity Diagram: Explanation: The arrow points towards the atom with the negative charge. It is the more electronegative atom. Guided Examples: HF H2O CCl4

  19. Video Recap!

  20. Guided Practice • Mg and O: ionic • C and O: • C and Cl: • K and Br: • Many Cu atoms: • Cland Cl: • K and F: • Many Au atoms: • Two atoms of I: • Srand O:

  21. Guided Practice Answers • Mg and O: ionic • C and O: covalent, polar • C and Cl: covalent, polar • K and Br: ionic • Many Cu atoms: metallic • Cland Cl: covalent, non-polar • K and F: ionic • Many Au atoms: metallic • Two atoms of I: covalent, non-polar • Srand O: ionic

  22. Independent Practice • Complete the following problems on a separate sheet of paper: • P. 214 #38, 40, 41 • P. 215 #47 • P.256 #45, 46 • Challenge Questions!! • P. 214 #43 • P. 215 #67

  23. Closing Essential Question: How do the properties of individual elements affect the types of bonds those elements form?

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