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11/28/2011 Standards : 2 O bjectives : a . Be able to describe formation of ionic bonds

RESPONDERS. 11/28/2011 Standards : 2 O bjectives : a . Be able to describe formation of ionic bonds b. Review for Quiz 2.3 (Ch 8 + Density - 2 problems) c. Be able to name and figure relative lattice energies for ionic cmpds D O NOW :

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11/28/2011 Standards : 2 O bjectives : a . Be able to describe formation of ionic bonds

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  1. RESPONDERS 11/28/2011 Standards: 2 Objectives: a. Be able to describe formation of ionic bonds b. Review for Quiz 2.3 (Ch 8 + Density - 2 problems) c. Be able to name and figure relative lattice energies for ionic cmpds DO NOW: 1. Write the correct chemical formula for the ionic compounds formed by each of these pairs of elements: Al & P(3-); Ca & Br; Fr & 52Te HOMEWORK: 1. Ch 8 Ch Assess, p. 236 47-59 (leave out 56 & 58) - copy questions, given your best answer & reason for the answer. Answers will be on-line this evening. (5 pts) 2. Create Help Sheet for Quiz 2.3 (Ch 8 + 2 density probs) (5 pts) 3. Don't forget the ChemThink.com assignment, due tonight (10 pts) =========================================================== STAMPS: Ex Cr for card decs for Mem Ions 2 (11 total now) ANNOUNCEMENT: My son Jacob and I, will be singing at the Variety Show – Fri 12/9 (next week) On-Line app for iPhones: "EMD PTE" is a free app that gives you a nice, interactive, PERIODIC TABLE. It may also be available for Droids, but I'm not sure.

  2. Answers to today's DO NOW

  3. More announcements for this week: Wed - Quiz 2.3 - Ch 8 (70%) and all the other chapters (30%) we have covered this yr (60 pts) Th - Memorize Ions - 2 - See "Quiz/Test Reviews" on my website for details (10 pts) Fri - Standard 1 CFA Quiz (10 pts)

  4. 1. Demo 2 Mg + O2 ---> 2 MgO 2. vid V +5 +4 +3 +2 change color vid.mpg - V forming different oxidation states with different colors from Interactive Chalkboard - Ch 6 (Periodic Table) 3. Use 2 quizzes: Naming Ionic Cmpds & Lattice Energy - included in this file, following this page

  5. Following are 2 gradable quizzes: 1. Naming Ionic Cmpds (4 q's) 2. Lattice Energy (5 q's)

  6. Naming Ionic Cmpds - responder quiz Grade: «grade» Name Ionic cmpd - responder quiz Subject: «date» Date:

  7. f 1 What is the correct formula for Barium phosphide ? A BaP B Ba3P2 C Ba2P3 D BaP3

  8. 2 What is the correct formula for Magnesium bromide ? A MgBr B Mg2Br C Mg2Br2 D MgBr2

  9. 3 What is the correct formula for calcium carbonate? A CCO3 B C2CO3 C CaCO3 D Ca2CO3

  10. 4 How would you name this ionic compound? NH4C2H3O2 A nitrile acid B acetate of ammonia C ammonia acetate D ammonium acetate

  11. Lattice Energies - Notes for understanding Smaller ions ===> larger negative value for lattice energy (meaning more lattice energy) Larger ions ===> smaller lattice energy (meaning smaller negative value for lattice energy) Charge of ion - larger charge (+ or -) ====> more lattice energy

  12. Lattice Energy Grade: «grade» 4 q's on LE Subject: «date» Date:

  13. 1 Answer? A B C D Explanations given below

  14. 2 Answer? A B C D Explanation given below

  15. 3 Answer? A MgO SrCl2 LiF AgCl B C D Explanations given below total relative strength anion relative strength formula of compound cation relative strength We don't need to check the sizes of the anions, because there are no ties for largest charge total

  16. 4 Answer? A B C D Explanation given below So the decision goes to the relative size of the anion!

  17. 5 Which of the following is more important in deciding the relative lattice energy of a compound? A Size of the ions? B Charge total of the aions?

  18. This quiz should only count for 4 questions, question 5 had problems to begin with and period 5 didn't have time to answer

  19. 11/29/2011 Standards: 2 (Chemical Bonds) Objectives: a. Review any HW not reviewed yesterday. b. Review for Quiz 2.3 (Ch 8 + Density - 2 problems) DO NOW: 1. Come up with 5 problems you need help with from HW given on Ch 8 2. If density = 3.2 g/mL and volume = 22.1 mL, what is mass? HOMEWORK: 1. Quiz 2.3 On-Line Practice Quiz. Copy question or summarize question, give correct answer, and reason for your answer, wich may include a page# (10 pts) Std: MISC 2. Brush up your Help Sheet for tomorrow's Quiz 2.3 (Ch 8 + Density) ========================================================= STAMPS: Journal 11/28 1. Ch 8 Ch Assess, p. 236 47-59 (leave out 56 & 58) (5 pts) Std MISC 2. Help Sheet Quiz 2.3 (5 pts) On-Line ChemThink – Ionic Bonding Tutorial and Quiz Questions (10 pts) is due today.

  20. 3 minutes How you dress sends a MESSAGE to others (one thing leads to another): Young ladies - dressing immodestly (skin showing in suggestive places) attracts boys to only one thing Young Men - you too! If all you want is surface relationships that mean nothing, what will married life be like for you? Remember there is other stuff you need to know about young women! Suggestive dress contributes to porn problem which is an addiction!!!!

  21. Review of Ch 8 (Quiz 2.3) 1. Electron Affinity 2. Molecules are electrically neutral (total (+)'s = total (-)'s) 3. Properties of ionic solids - strongly affected by LE (lattice energy) melting point vs LE (directly proportional) boiling point vs LE (directly proportional) hardness vs LE (directly proportional 4. Ionic Bonds are strongest of all bonds 5. Chemical formula of ionic bonds

  22. Electronegativity - ability of an atom in a molecule to attract the bonding electrons. Ionization Energy - energy required to remove electrons from the valence shell of an atom. Electron Affinity - energy given off when an electron is accepted by a non-metal. All have the same trend

  23. Use lesson plan for 11/18 - alloys, lattice structures (substitutional & interstitial) 3-D Crystal lattice http://michele.usc.edu/105a/crystal/example.html

  24. Copy the HW from my website 11/30/2011 Standards: Many Objectives: a. Check for understanding with Quiz 2.3 - Ch 8.1-8.4 + density DO NOW: 1. Clear desks and floor, all materials to side or back counters. Desks: scantron, help sheet, pencil, eraser, calculators, scratch paper HOMEWORK: 1. SN Ch 9.1 p. 107-110 (5 pts) Std 2 2. ChemThink - Covalent Bonding Tutorial (3 pts) and Questions (7 pts) Std 2 =========================================================== STAMPS: NONE BASKET: Quiz 2.3 On-Line Practice Quiz (5 pts) Std MISC Due tomorrow Due Tu next wk

  25. Students doing arranging: 1. put in 5 piles Help Sheet scratch paper Quizzes Scantrons Periodic Charts 2. Arrange Periodic Charts - smallest #'s on top ` Tests - smallest #'s on op Scantrons - smallest #'s on top 3. Fan tests so all #'s can be seen

  26. 12/1/2011 Standards: 2 (Chemical Bonding) Objectives: a. Check for understanding: Mem Ions 2 (11 ions) b. Be able to understand questions from SN Ch 9.1 c. Prep for Standards Quiz for Std 1 DO NOW: 1. Review for quiz on your own as I stamp. Then, Clear desks, floor, etc - everything on side counters for HOMEWORK: 1. Page 244 PP's 1-5 (5 pts) Std 2 (re-watch video on Covalent Bonding - "Lewis Structures of covalent Molecules for beginners - Part 1" as shown in class today 2. Structure of the Atom - Std 1 Quiz tomorrow (20 pts) ====================================================== STAMPS: Journal 11/29 (day before Quiz 2.3) 1. SN Ch 9.1 p. 107-110 (5 pts) Std 2

  27. Lewis Structures of covalent Molecules for beginners - Part 1

  28. Lewis Structures For Covalent Molecules Std 2 Atoms Valence Electrons Lewis Structure H2O O O H2 formula H H Total bonding Unshared A bonding pair of electrons = Check 2 things to have a correct Lewis Structure 1. Every atoms has 8 electrons except H (only needs 2) 2. Total electrons in Lewis Structure = total of all valence electrons from the individual atoms.

  29. Pre-Quiz Review Grade: «grade» Standard 1 Subject: «date» Date:

  30. 1 Answer? 1. The atomic number in the periodic table is lowest in the quadrants of periodic chart A upper left corner B upper right corner C lower left corner D lower right corner

  31. 2. The electronegativity of an element indicates the relative ability of its atoms to attract electrons in a chemical bond. As you move down a group in the periodic table the atomic number: A. increases and the electronegativity increases. B. increases and electronegativity decreases C. decreases and the electronegativity increases D. decreases and the electronegativity decreases electronegativity 2 Answer? A D B C

  32. 3 Answer? 3. Which of these elements has the weakest attraction for electrons? A. Boron ( atomic number = 5) B. Calcium ( atomic number = 20) C. Hydrogen ( atomic number = 1) D. Sulfur ( atomic number = 16) A B C D

  33. 4. When a lithium atom loses its electrons, how does its density and weight change? A. Its density and weight both decrease slightly. B. Its density decreases significantly, and its weight decreases slightly. C. Its density and weight both decrease significantly. D. Its density increases significantly, and its weight decreases slightly. 4 Answer? A B C D

  34. 12/2/2011 Standards: Objectives: a. DO NOW: 1. HOMEWORK: 1. ========================================================= STAMPS:

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