Today in I.S.…
Week # 3 Quarter 2 (10/28)
Homework:
None
I.S. Learning Goal:
•I can describe the features and components Quiz Wednesday
of the atom.
•I can apply models to features of an atom
Fact of the Day
Warm Up: new handout
For element Al what is
Lewis Dot and Bohr
Model?
To Do Today:
*Organize notebooks
*Bohr Model building
practice
The first Jack
O’Lanterns were
actually made from
turnips.
Halloween is the
second highest
grossing commercial
holiday after
Christmas.
Bohr models: http://www.bing.com/images/search?q=periodic+table+with+bohr+model&qs=n&form=QBIR&pq=periodic+table+with+bohr+model&sc=228&sp=-1&sk=#view=detail&id=84E87C34FE80C1EB7CFAD0A3811B29AFD10F3DF4&selectedIndex=7
Today in I.S.…
Week # 3 Quarter 2 (10/29)
Homework:
None
I.S. Learning Goal:
•I can describe the features and components
of the atom.
•I can apply models to features of an atom
Fact of the Day
Warm Up: Find the
element Silicon
Draw Lewis Dot and
Bohr model.
To Do Today:
1. Warm Up
2. Pick up Periodic
Table Basics -Begin
Samhainophobia is
the fear of
Halloween
Boston,
Massachusetts,
holds the record
for the most Jack
O’Lanterns lit at
once
Begin work on periodic
table basics.
You may work with one
partner
Today in I.S.…
Week # 3 Quarter 2 (10/30 & 31)
Homework:
None
I.S. Learning Goal:
•I can describe the features and components
of the atom.
Fact of the Day
•I can apply models to features of an atom
Warm Up:
Find the element
phosphorus
What is Lewis Dot
structure and Bohr model
To Do Today:
*review handout
*video on Periodic Table
*Quiz
*puzzle
If you stare into the
mirror at midnight on
Halloween, what does
superstition say you
going to see?
Your Future Spouse
Which Halloween
creature has a long
middle finger, an unibrow
and tattoos?
A Werewolf
Bohr models: http://www.bing.com/images/search?q=periodic+table+with+bohr+model&qs=n&form=QBIR&pq=periodic+table+with+bohr+model&sc=228&sp=-1&sk=#view=detail&id=84E87C34FE80C1EB7CFAD0A3811B29AFD10F3DF4&selectedIndex=7
Elemental Review
pg. 13
(notebook paper)
1. Fold paper in 1/3
2. Glue (little bit…) onto notebook paper pg 13
1. Front Element Name and symbol
2. Inside left – Atomic Mass and Atomic Number
3. Right – Protons, Neutrons and Electrons
4. Open right flap (center) Lewis Dot
5. Right flap Bohr Model
3. On bottom of page write a paragraph describing vocab
terms – highlight terms!
Periodic table, charge and location of protons, electrons
and neutrons, groups, periods, valence electrons
4. Turn into box
Today in I.S.…
Week # 3 Quarter 2 (11/1)
Homework:
None
I.S. Learning Goal:
•I can describe the features and components
of the atom.
Fact of the Day
•I can apply models to features of an atom
Just one atomic layer
thick, the 'miracle
Warm Up:
material' Graphene is
Find the element Carbon
a better conductor of
electricity and heat
What is Lewis Dot structure
than any material.
and Bohr model
To Do Today:
*Periodic Table Basics
*Quiz
*puzzle
Elemental Quiz
Complete the Periodic Table Basis
Worksheet
Review puzzle
You should know how to draw
Lewis Structures and Bohr Models
for the first 20 elements.
Today in I.S.…
Week # 3 Quarter 2 (11/4)
I.S. Learning Goal:
I can describe predict properties of elements and
compounds using trends of the periodic table (e.g.,
metals, non-metals, bonding – ionic/covalent).
Warm Up:
To Do Today:
Homework:
None
Fact of the Day
Objectives
0Explain why atoms form bonds
0Define chemical bond & name
three types of chemical bonds
0Determine the chemical formulas
for covalent and ionic compounds
Bonding Atoms
0 Why do atoms bond?
- each atom wants a full outermost
energy level
- gain, lose, and share valence
electrons to achieve the duet or octet
rule aka: “being happy”
- gives each atom an electron
configuration similar to that of a
noble gas
ex. GROUP VII: He, Ne, Ar
Rhyme
1 Bond
2 bond
3 bond 4
3 bond 2 bond 1
No more
Chemical Bonds
0 Chemical Bonds
- attractive force that holds atoms or ions
together
- 3 types
ionic, covalent, metallic
- determines the structure of compound
- structure affects properties
- melting/boiling pts, conductivity etc.
Types
of
bonds
1. Ionic Bond
0 Between atoms of metals and nonmetals with
very different electronegativity
0 Electronegativity, symbol χ, is a chemical property
that describes the tendency of an atom or a
functional group to attract electrons
0 Bond formed by transfer of electrons
0 Produce charged ions all states. Conductors
and have high melting point.
0 Examples; NaCl, CaCl2, K2O
Ionic Bonds: One Big Greedy Thief
Dog!
2. Covalent Bond
0Between nonmetallic elements of similar
electronegativity.
0 Electronegativity, symbol χ, is a chemical property that describes the tendency of
an atom or a functional group to attract electrons
0Formed by sharing electron pairs
0Stable non-ionizing particles, they are
not conductors at any state
0Examples; O2, CO2, C2H6, H2O, SiC
Bonds in all the
polyatomic ions
and diatomics
are all covalent
bonds
3. NONPOLAR
COVALENT BONDS
when electrons are shared
equally
H2 or Cl2
2. Covalent bonds- Two atoms share one or more pairs of outer-shell electrons.
Oxygen Atom
Oxygen Atom
Oxygen Molecule (O2)
POLAR COVALENT
BONDS
when electrons
are shared but
shared unequally
H2O
Polar Covalent Bonds: Unevenly
matched, but willing to share.
- water is a polar molecule because oxygen is more electronegative than hydrogen,
and therefore electrons are pulled closer to oxygen.
METALLIC BOND
bond found in
metals; holds metal
atoms together
very strongly
Metallic Bond
0Formed between atoms of metallic
elements
0Electron cloud around atoms
0Good conductors at all states, lustrous,
very high melting points
0Examples; Na, Fe, Al, Au, Co
Metallic Bonds: Mellow dogs with
plenty of bones to go around.
Predicting Bond Type
Naming Ionic Compounds
0Naming ionic compounds (binary)
Formula to Name
- name of cation followed by the name of
the anion
ex. NaCl: Sodium Chloride
ZnO: Zinc Oxide
CuCl2: Copper Chloride
Naming Ionic Compounds
0 Practice Problems
MgBr2
Magnesium Bromide
KI
Potassium Iodide
CuCl2
Fe2S3
Copper (II) Chloride
Iron (III) Sulfide
Formulas of Ionic Compounds
0 Writing formulas for ionic compounds
Name to Formula
- balance the cation charge and anion charge, leaving NO net
charge
- use subscripts to denote the number of atoms in the formula
ex. NaCl: Na+ Cl- : NaCl
CaCl: Ca2+ Cl- : CaCl2
**1 to 1 ratios do not designate charge**
**Criss-Cross charges into subscripts**
Practice Problems
0 Write the formula for the following atoms
a.lithium oxide
Li2O
b.
beryllium chloride
BeCl2
c. titanium (III) nitride
TiN
d. cobalt (III) hydroxide
Co(OH)3
Naming
Covalent
Compounds
0 Prefix System
# of atoms
1
2
3
4
5
6
7
8
9
10
prefix
mono
di
tri
tetra
penta
hexa
hepta
octa
nona
deca
Naming Covalent Compounds Cont.
0 Rules for the prefix system
1. less electronegative element is given first. It is given a prefix
only if it contributes more than one atom to a molecule of the
compound
2. The second element is named by combining (a) a prefix
indicating the number of atoms contributed by the atom (b) the
root of the name of the second element, and (c) the ending –ide
3. The o or a at the end of a prefix is usually dropped when the
word following the prefix begins with another vowel
ex. Monoxide or pentoxide
Naming Covalent Compounds Cont.
Naming covalent compounds from formula
1. SiO2
Silicon dioxide
2. PBr3
Phosphorus tribromide
3. CI4
Carbon tetraiodide
4. N2O3
Dinitrogen trioxide
Writing Formulas for Covalent
Compunds
0
1.
Writing formulas from names
Carbon Dioxide
CO2
2.
3.
4.
Dinitrogen Pentoxide
N2O5
Triphosphorus monosulfide
P3S
Sulfur Monobromide
SBr
Polyatomic Ions
(pass out polyatomic sheet to
be used on assessments)
0 Common Polyatomic Ions