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To Do…

This outline highlights key assignments for the week, including HW6 (Type 1 due April 21, Type 2 due April 23) and discussions covering Chapters 11 and 12. Essential tasks include turning in the Modern Atomic Theory lab write-up and engaging in clicker questions on atomic radius and ionization energy trends. Key concepts discussed include types of chemical bonds—ionic and covalent—with emphasis on the stability of molecules. Prepare for class discussions and understanding the interactions between atoms in chemical bonding.

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To Do…

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  1. To Do… • Electronic homework (Lon-Capa) • HW6 Type 1 due Monday, April 21 by 7 pm; HW6 Type 2 due Wednesday, April 23 by 7 pm • Friday Discussion • Chapter 11&12 homework • Turn in Modern Atomic Theory lab write-up • Tuesday lecture • Continue reading Chapter 12

  2. General Trend (Atomic Size/Radius)

  3. General Trend (Ionization Energy)

  4. Clicker Question Rank the following from smallest to largest atomic radius. a) Rb, Ca, Br, N b) Br, N, Rb, Ca c) N, Rb, Br, Ca d) N, Br, Ca, Rb e) Ca, Rb, N, Br

  5. Clicker Question Rank the following from lowest to greatest ionization energy. a) Rb, Ca, Br, N b) Br, N, Rb, Ca c) N, Rb, Br, Ca d) N, Br, Ca, Rb e) Ca, Rb, N, Br

  6. Overall goal:

  7. Overall goal:

  8. Chemical Bond • Force that holds groups of two or more atoms together and makes them function as a unit. • Atoms will bond if the molecule is more stable than the two separated atoms (lower energy state).

  9. Ionic Bonding

  10. Al →Al3+ + 3e–

  11. Cl + e–→Cl–

  12. Forming H2

  13. Covalent Bonding

  14. Clicker Question Imagine the bond formed in the carbon monoxide molecule (C-O). Which atom would you expect to have a greater attraction for the electrons in the bond? a) carbon b) oxygen c) They have the same attraction (both have n=2 as highest energy level with an electron). d) I do not know.

  15. Polar Covalent Bonding

  16. Figure 12-4 p271

  17. Clicker Question How do lithium, fluorine, and cesium compare with regard to attraction for an electron in a shared bond? a) Li>Cs>F b) F>Cs>Li c) F>Li>Cs d) Li>Cs>F e) Cs>F>Li

  18. Electronegativity

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