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 & 52 Te HOMEWORK: 1. Ch 8 Ch Assess, p (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 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) AN NOUNCEMENT: 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. RESPONDERS

Answers to today's DO NOW

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

1. Demo 2 Mg + O 2 ---> 2 MgO 2. vid V 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

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

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

1 What is the correct formula for Barium phosphide ? A BaP B Ba 3 P 2 C Ba 2 P 3 D BaP 3 f

2 What is the correct formula for Magnesium bromide ? A MgBr B Mg 2 Br C Mg 2 Br 2 D MgBr 2

3 What is the correct formula for calcium carbonate? A CCO 3 B C 2 CO 3 C CaCO 3 D Ca 2 CO 3

4How would you name this ionic compound? NH 4 C 2 H 3 O 2 A nitrile acid B acetate of ammonia C ammonia acetate D ammonium acetate

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

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

1Answer? A B C D Formula of cmpd cation relative strength anion relative strength Total relative strength MgCl2 Mg2+ Cl1- 3 AlCl3 Al3+ Cl1- 4 NaCl Na1+ Cl1- 2 LiCl Li1+ Cl1- 2 Explanations given below

2Answer? A B C D Explanation given below Formula of cmpd cation relative strength anion relative strength Total relative strength BP B3+ P3- 6 Al2O3 Al3+ O2- 5 MgO Mg2+ O2- 4 B2O3 B3+ O2- 5

3Answer? A B C D Explanations given below total relative strength formula of compound MgO SrCl 2 LiF AgCl cation relative strength anion relative strength We don't need to check the sizes of the anions, because there are no ties for largest charge total

4Answer? A B C D Explanation given below Formula of cmpd cation relative strength anion relative strength Total relative strength LiF Li1+ F1- 2 LiBr Li1+ Br+ 2 LiI Li1+ I1- 2 LiCl Li1+ Cl1- 2 So the decision goes to the relative size of the anion!

5Which 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?

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

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 (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.

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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

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

Use lesson plan for 11/18 - alloys, lattice structures (substitutional & interstitial) 3-D Crystal lattice

11/30/2011 Standards: Many Objectives: a. Check for understanding with Quiz Ch 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 (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 Copy the HW from my website Due tomorrow Due Tu next wk

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

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 (5 pts) Std 2

Lewis Structures of covalent Molecules for beginners - Part 1

formula Lewis Structure HH O H2OH2O H2H2 O Total Unshared bonding AtomsValence Electrons 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. Lewis Structures For Covalent Molecules Std 2

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

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

electronegativity 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 2Answe r? A BC D

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) 3Answer ? AB CD

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. 4Answ er? A BC D

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