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To Do…

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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