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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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slide1

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.

slide3

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)

slide4

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

slide5

Following are 2 gradable quizzes:

1. Naming Ionic Cmpds (4 q's)

2. Lattice Energy (5 q's)

slide6

Naming Ionic Cmpds - responder quiz

Grade:

«grade»

Name Ionic cmpd - responder quiz

Subject:

«date»

Date:

slide7

f

1

What is the correct formula

for Barium phosphide ?

A

BaP

B

Ba3P2

C

Ba2P3

D

BaP3

slide8

2

What is the correct formula

for Magnesium bromide ?

A

MgBr

B

Mg2Br

C

Mg2Br2

D

MgBr2

slide9

3

What is the correct formula for

calcium carbonate?

A

CCO3

B

C2CO3

C

CaCO3

D

Ca2CO3

slide10

4

How would you name this ionic compound? NH4C2H3O2

A

nitrile acid

B

acetate of ammonia

C

ammonia acetate

D

ammonium acetate

slide12

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

slide13

Lattice Energy

Grade:

«grade»

4 q's on LE

Subject:

«date»

Date:

slide14

1

Answer?

A

B

C

D

Explanations given below

slide15

2

Answer?

A

B

C

D

Explanation given below

slide16

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

slide17

4

Answer?

A

B

C

D

Explanation given below

So the decision goes to the relative size of the anion!

slide18

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?

slide19

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

slide21

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.

slide24

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!!!!

slide25

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

slide26

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

slide27

Use lesson plan for 11/18 - alloys, lattice structures

(substitutional & interstitial)

3-D Crystal lattice

http://michele.usc.edu/105a/crystal/example.html

slide28

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

slide32

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

slide33

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

slide36

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.

slide37

Pre-Quiz Review

Grade:

«grade»

Standard 1

Subject:

«date»

Date:

slide38

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

slide39

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

slide40

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

slide41

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

slide42

12/2/2011 Standards:

Objectives:

a.

DO NOW:

1.

HOMEWORK:

1.

=========================================================

STAMPS: