11/19/2012 Standards: 1 (Str of Atom) and Objectives: 2 (Chem Bonds)a. Test for understanding – Std 1 – Structure of the Atomb. Be able to draw at least 1 Lewis Structure for a covalent molecule DO NOW: Get responders, after stamping, Clear desks of everything

HOMEWORK: 1. ChemThink.com - Covalent Bonding Tutorial & Questions (15 points)

Std 2 (due tonight, midnight) 2. HANDOUT - Polarity in Bonds vs Polarity in Molecules - Use this handout to

draw Lewis Structures for these molecules: CO2 F2O H2O H2S HCN (5 pts) Std 2===========================================================BASKET: Journal 11/16 1. Page 244 PP's 1-5 (Lewis Structures) (5 pts) Std 2

RESPONDERS

except: responders, blank paper (headed Std 1 Quiz Notes), pencil

Std 1 Quiz tomorrow - 40 pts

formula

Lewis Structure

H H

OH2O

H2

O

Total

Unshared

bonding

Atoms Valence Electrons

A bonding pair of electrons =

Check 2 things to have a correct Lewis Structure1. Every atom in molecule 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

Moleculeformula

1

Start Lewis Strwithout electrons

2

Redraw &connect atomswith bonding pairs

3

Calculate total valence electronsand subtract bonding electrons

4

Check step1. all have 8 except H Be B 2 4 62. TOTAL electrons correct

5

`

Moleculeformula

1

Start Lewis Strwithout electrons

2

Redraw &connect atomswith bonding pairs

3

Calculate total valence electronsand subtract bonding electrons

4

Check step1. all have 8 except H Be B 2 4 62. TOTAL electrons correct

5 Br2

PCl3- CCl4

`

Moleculeformula

1

Start Lewis Strwithout electrons

2

Redraw &connect atomswith bonding pairs

3

Calculate total valence electronsand subtract bonding electrons

4

Check step1. all have 8 except H Be B 2 4 62. TOTAL electrons correct

5 NF3

BH3-NH41+

`

11/20/2012 Standards: 2 (Chemical Bonds) Objectives:a. Std 1 Quiz (40 pts)b. Be able to draw Lewis Structures for covalent molecules (who is central

atom). DO NOW: 1. Clear desks and floors - keep responders and blank paper for scratch 2. The Lewis Structures for these molecules:

N2 HCN 3. Define VSEPR (what each letter means and what the theory states).HOMEWORK: NONE - watch vids on-line to help understand drawing Lewis Str. Enjoy friends and family during the Thanksgiving Season.

BE GRATEFUL FOR ALL YOUR BLESSINGS, AND YOU'LL ENJOY HAVING MORE BLESSINGS.====================================================== JOURNAL: 11/19BASKET: HANDOUT (or on your own paper) -

Drawing Lewis Structures - draw Lewis Structures for these molecules: CO2 F2O H2O H2S HCN (5 pts) Std 2

RESPONDERS

resonance

linearbenttrigonal planartrigonal pyramidtetrahedral

12/7/2011 Standards: 2 (Chemical Bonds) Objectives:a. Be able to draw Lewis Structures for covalent molecules.b. Be able to use VSEPR to predict shapes (5) of molecules c. Be able to perform LAB - Molecular Geometry, Lewis Str & VSEPR. DO NOW: 1. p. 255-257 30, 32, 34 HOMEWORK: 1. p. 255-257 PP's 30-38 (5 pts) Std 2 2. Read through lab at least once and be sure you understand the 3 reasons

for molecular shapes ========================================================STAMPS:

Journal 12/5 & 12/6 1. PRINT Polarity in Bonds vs Polarity in Molecules (1 pts) Std 2 2. PRINT MOLECULAR GEOMETRY, LEWIS STRUTURES

AND VSEPR – lab (1 pts) Std 2ANNOUNCEMENTS:Mr. Wigger & son Jacob will only perform on Friday night. Will give you preview today (end of period).

This is how we get more than one bond - WE ARE OUT OF ELECTRONS

2. put in bonding electrons

total left for the rest of the Lewis Structure

Not enough to go around N doesn't have 8

4. Start Sharing

N still doesn't have enough electrons

5. m

ore

shar

ing

1. basic layout

1. H has 2, C has 8, N has 8Total electrons = 8

Total valence electrons

Subtract bonding electrons

3. add in leftovers

Valence electrons available

ElementElement Valence

electronsin Lewis Str

BCBePH

(Column)

12/8/2011 Standards: 2 (Chemical Bonding) Objectives:a. Prep for tomorrow's lab - MOLECULAR GEOMETRY, LEWIS

STRUCTURES AND VSEPR - Zum (computer)b. Be able to identify all 5 shapes from the VSEPR theoryc. Be able to predict shape based on central atom having share or unshared DO NOW: 1. Draw Lewis Structures for BeBr2 SO2 CO2

Show columns 3-5HOMEWORK: 1. Memorize Ions Quiz 3 coming next Tuesday. Start studying.

16 ions will be on this quiz. 2. PRINT Lewis Structures and Molecular Geometry - Ball & Stick

(Shapes) (1 pts) Std 2 =====================================================STAMPS: Journal 12/7 1. Ch 9.3, PP's p. 255-257 #30-38 (5 pts) Std 2

ANNOUNCEMENTS:ChemThink.com - Molecular Shape tutorial and questions due tonight by mid-night

Teacher NotesExplanations will be given by models (show all shapes in 3-D), magnets to demo effects of unshared pairs, and game

linearbenttrigonal planartrigonal pyramidtetrahedral

TN

Moleculeformula

1

Start Lewis Strlay out atoms

2

Put in bondingpairs to connectall atoms(redraw here)

3

Calculate total valence electronsand sub bondingelectrons

4

Check step1. all have 8 except H Be B 2 4 62. TOTAL electrons correct5

As a Man thinketh, so is

he.By: Tim Allen

Lazy thoughts crystallize into habits of uncleanness and

dishonesty. This solidifies into circumstances of foulness and

begging.16:50

Molecular Shapes

1. Linear

Remember that all atoms want ____ valence electrons.8O O

N

2. Trigonal Planar

Molecular Shapes

3. Tetrahedral 4. Trigonal Pyramidal

5. Bent

does have unshared pairson central atom

does not have unshared pairson central atom

12/9/2011 Standards: 2 (Chemical Bonding)Objectives: (20 pts)a. LAB - Lewis Structures and Molecular Geometry - Zum -

Copy FORMULAS of all molecules before starting lab.DO NOW: 1. Read lab SILENTLY Pay special attention to #5HOMEWORK: 1. Ch 9.4 p. 262 49-52. DO NOT FOLLOW DIRECTIONS IN TEXT.

Draw Lewis Structure & show total valence electrons & shape as you will do in today's lab. 2. Lab - Lewis Str & Molecular Geo - Ball & Stick (Shapes) (1 pt) Std 2 3. Remember Memorize Ions 3 next Wed - All 13 ions and first 3 acids (15 points)============================================================STAMPS: NONE

linearbenttrigonal planartrigonal pyramidtetrahedral

LAB WILL BE DUE ON MONDAY

see page 260 for shapes

Unshared pairs are the name of the game

Page 260

teardrop = unshared

pair

no teardrops = no unshared

pairs

teardrop = unshared

pair

teardrop = unshared

pair

unshared pair impossible

does have unshared pairson central atom

does not have unshared pairson central atom

Moleculeformula

1

Start Lewis Strlay out atoms

2

Put in bondingpairs to connectall atoms(redraw here)

3

Calculate total valence electronsand sub bondingelectrons

4

Check step1. all have 8 except H Be B 2 4 62. TOTAL electrons correct5

Moleculeformula

1

Start Lewis Strlay out atoms

2

Put in bondingpairs to connectall atoms(redraw here)

3

Calculate total valence electronsand sub bondingelectrons

4

Check step1. all have 8 except H Be B 2 4 62. TOTAL electrons correct5

Moleculeformula

1

Start Lewis Strlay out atoms

2

Put in bondingpairs to connectall atoms(redraw here)

3

Calculate total valence electronsand sub bondingelectrons

4

Check step1. all have 8 except H Be B 2 4 62. TOTAL electrons correct5