1. Monday Dec 8 TAKE OUT “ADDITIONAL QUESTIONS WKSHT” TO BE STAMPED Objective: Determine the molecular geometry of a compound given the Lewis Structure Checkpoint: Name the following compounds: C 2 H 4 Co 2 O Draw Lewis Structures for the following compounds and determine the shape of the molecule: – NO 3 - – PCl 3 Homework: bring devices tomorrow, finish molecular geometry worksheet

6. Thought of the Week

7. Materials Design: Background Research Rename your file: Class name: last name, first name: background research Chunky Monkey: Pitt, Brad: background research Share with losaltos.science@gmail.com

9. Molecular Models Activity SHAPE Do not do CH 3 OH, C 2 H 4, last 4 challenge molecules

10. Electronegativity will determine if a molecule is: non-polar covalent (equal electron sharing) polar covalent (unequal sharing?)

11. Review of Electronegativity Electronegativity is the ability of an atom to attract electrons to itself. The most electronegative atoms on the periodic table are nitrogen, oxygen, and fluorine (in that order). N, O, F

12. F H

13. F H F H F H

14. F H F H Non-polar covalent (equal sharing of electrons)

15. F H Polar covalent (unequal sharing of electrons)

16. Determining polarity in covalent bonds

18. Electronegativity Values

19. What are the three most electronegative (electron greedy) elements on the periodic table?

20. Electronegativity Values What are the three most electronegative (electron greedy) elements on the periodic table? N, O, F

21. A molecule will be non-polar covalent if electrons are shared equally. This will happen if the electronegativity difference between two atoms is less than 0.5. C and H will form a non-polar covalent bond because 2.5-2.1 = 0.4

22. A molecule will be polar covalent if electrons are shared unequally. This will happen if the electronegativity difference between two atoms is between 0.5 and 1.7. N and H will form a polar covalent bond because 3.0-2.1 = 0.9

23. Molecular Models Activity SHAPE For each bond, label P or NP