11/19/2012 Standards : 1 (Str of Atom) and O bjectives : 2 (Chem Bonds)

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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

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

Start Lewis Strwithout electrons

Redraw &connect atomswith bonding pairs

Calculate total valence electronsand subtract bonding electrons

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

Moleculeformula

PCl3- CCl4

Moleculeformula

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

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

Moleculeformula

Start Lewis Strlay out atoms

Put in bondingpairs to connectall atoms(redraw here)

Calculate total valence electronsand sub bondingelectrons

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

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

LAB WILL BE DUE ON MONDAY

see page 260 for shapes

Unshared pairs are the name of the game

teardrop = unshared

no teardrops = no unshared

teardrop = unshared

unshared pair impossible

does have unshared pairson central atom

does not have unshared pairson central atom

Moleculeformula

11/19/2012 Standards : 1 (Str of Atom) and O bjectives : 2 (Chem Bonds)

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