RESPONDERS
11/19/2012 Standards: 1 (Str of Atom) and
Objectives:
2 (Chem Bonds)
a. Test for understanding – Std 1 – Structure of the Atom
b. Be able to draw at least 1 Lewis Structure for a covalent molecule
DO NOW:
Get responders, after stamping, Clear desks of everything
except: responders, blank paper (headed Std 1 Quiz Notes), pencil
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
Std 1 Quiz tomorrow - 40 pts
Lewis Structures For Covalent Molecules
Atoms
Lewis Structure
H2O
Valence Electrons
O
H2
O
formula
H
Std 2
H
Total
bonding
Unshared
A bonding pair of electrons =
Check 2 things to have a correct Lewis Structure
1. 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.
Molecule
formula
1
Start Lewis Str
without
electrons
2
Redraw &
connect atoms
with bonding pairs
Calculate total
valence electrons
and subtract
bonding electrons
3
4
Check step
1. all have 8
except
H Be B
2
4
6
2. TOTAL
electrons correct
5
`
Molecule
formula
1
Start Lewis Str
without
electrons
2
Redraw &
connect atoms
with bonding pairs
Calculate total
valence electrons
and subtract
bonding electrons
3
4
Check step
1. all have 8
except
H Be B
2
4
6
2. TOTAL
electrons correct
5
Br2
`
PCl
3
- CCl4
Molecule
formula
1
Start Lewis Str
without
electrons
2
Redraw &
connect atoms
with bonding pairs
Calculate total
valence electrons
and subtract
bonding electrons
3
4
Check step
1. all have 8
except
H Be B
2
4
6
2. TOTAL
electrons correct
5
NF3
`
BH
3
-NH41+
11/20/2012 Standards: 2 (Chemical Bonds)
Objectives:
RESPONDERS
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: 11/19
BASKET:
HANDOUT (or on your own paper) Drawing Lewis Structures - draw Lewis Structures for these molecules:
CO2 F2O H2O H2S HCN
(5 pts) Std 2
resonance
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:
linear
1.
p. 255-257 30, 32, 34
bent
HOMEWORK:
trigonal planar
trigonal pyramid
1. p. 255-257 PP's 30-38 (5 pts) Std 2
tetrahedral
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 2
ANNOUNCEMENTS:
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
1. basic layout
2. put in bonding electrons
Total valence electrons
Subtract bonding electrons
total left for the rest of the
Lewis Structure
3. add in leftovers
Not enough
to go around
N doesn't have 8
1. H has 2, C has 8, N has 8
N still doesn't have
enough electrons
5. more sharing
4. Start Sharing
Total electrons = 8
Element
Element
B
C
Be
P
H
Valence
electrons
available
(Column)
Valence
electrons
in Lewis Str
TN
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 theory
c. 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 3-5
HOMEWORK:
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
linear
bent
trigonal planar
trigonal pyramid
tetrahedral
ANNOUNCEMENTS:
ChemThink.com - Molecular Shape tutorial and questions due tonight by mid-night
Teacher Notes
Explanations will be given by models (show all shapes in 3-D), magnets to demo effects of
unshared pairs, and game
Molecule
formula
1
Start Lewis Str
lay out atoms
Put in bonding
pairs to connect
all atoms
(redraw here)
Calculate total
valence electrons
and sub bonding
electrons
2
3
4
Check step
1. all have 8
except
H Be B
2
4
6
2. TOTAL
electrons correct
5
As a Man thinketh,
so is he.
B
y: Tim Allen
Lazy thoughts crystallize into habits
of uncleanness and dishonesty.
This solidifies into circumstances of
foulness and begging.
1
6:50
Molecular Shapes
1. Linear
2. Trigonal Planar
O
O
8N
Remember that all atoms want ____ valence
electrons.
Molecular Shapes
3. Tetrahedral
4. Trigonal Pyramidal
5. Bent
does have unshared pairs
on central atom
does not have unshared pairs
on central atom
12/9/2011 Standards: 2 (Chemical Bonding)
Objectives:
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 #5
HOMEWORK:
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
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
linear
(20 pts)
bent
trigonal planar
trigonal pyramid
tetrahedral
today's lab.
see page 260 for shapes
Unshared pairs are the name
of the game
no teardrops = no unshared
pairs
Page 260
unshared pair impossible
teardrop = unshared
pair
teardrop = unshared
pair
teardrop = unshared
pair
does have unshared pairs
on central atom
does not have unshared pairs
on central atom
Molecule
formula
1
Start Lewis Str
lay out atoms
Put in bonding
pairs to connect
all atoms
(redraw here)
Calculate total
valence electrons
and sub bonding
electrons
2
3
4
Check step
1. all have 8
except
H Be B
2
4
6
2. TOTAL
electrons correct
5
Molecule
formula
1
Start Lewis Str
lay out atoms
Put in bonding
pairs to connect
all atoms
(redraw here)
Calculate total
valence electrons
and sub bonding
electrons
2
3
4
Check step
1. all have 8
except
H Be B
2
4
6
2. TOTAL
electrons correct
5
Molecule
formula
1
Start Lewis Str
lay out atoms
Put in bonding
pairs to connect
all atoms
(redraw here)
Calculate total
valence electrons
and sub bonding
electrons
2
3
4
Check step
1. all have 8
except
H Be B
2
4
6
2. TOTAL
electrons correct
5