Embed Size (px)
Citation preview
You Will Need:1. Pencil, Text Book- Periodic Table,
Colored Pencils2. CALCULATOR2. Get out your 7 page packet3. Textbook open to Periodic Table (196-
197)YOU SHOULD HAVE 4 pages 7 sides to
your packet.4. Test #3 Corrections and Parent
Signature - Due NOW
Please SCHEDULE:
1. To take Part 2 for the 1st time OR to
2. Retake Test #3
• Part 2 – 101/145 or lower
3. Parent Signature and Corrections – due TODAY.
Element Bohr Model Lewis Dot (Symbol + Valence)
Lithium
Atomic #
Atomic Mass – Atomic #
Neon
Atomic #
Atomic Mass – Atomic #
Row =
Electrons= Protons =
Neutrons =
2
3-3+
7-3=
4
P = 3N = 4
21
Li
Row =
Electrons= Protons =
Neutrons =
P =10N =10 Ne
10
10-10+
20-10
10
28
Turn to the blank page #4 behind the Bohr Model and Lewis Dot Diagrams
P=8N=8
P=1N=0
P=1N=0
How to determine the type of bond in a compound?
Calculate the electronegativity factor
What is ELECTRONEGATIVITY? A measure of how much an element wants an electron
How do you know the electronegativity factor of an element?
Look it up (see next slide)
What are the determining values for each type of bond?
0Non-polar covalent
.5Polar covalent
1.7Ionic
http://www.tutor-homework.com/Chemistry_Help/electronegativity_table/electronegativity.html
ELECTRONEGATIVITY VALUES
Let’s try a couple:
P=8N=8
P=1N=0
P=1N=0
H2OCalculate the electronegativity factor
H = 2.1O = 3.5
3.5 – 2.1 = 1.4
NaCl
0Non-polar covalent
.5Polar covalent
1.7Ionic
Polar Covalent
Ionic
Na = .9Cl = 3.0
3.0 - .0 = 2.1
Let’s try a couple:
P=8N=8
P=1N=0
P=1N=0
KCl Calculate the electronegativity factor
K = CL =
CH4C = H=
What are the determining values for each type of bond?
0Non-polar covalent
.5Polar covalent
1.7Ionic
Ionic
.83.0
3.0 - .8 = 2.2
2.52.1
2.5 – 2.1 = .4 Non-polar covalent
Let’s try a couple:
P=8N=8
P=1N=0
P=1N=0
KCl Calculate the electronegativity factor
K = CL =
CH4C = H=
CCl4
CO2
C16H34 (diesel fuel)
Ionic
.83.0
3.0 - .8 = 2.2
2.52.1
2.5 – 2.1 = .4 Non-polar covalent
1. Materials Manager Log in to Learning Point – in charge of PPT
2. Complete Bonding Type Identification
3. Complete Notes and Diagrams – should be done up to page 6 for homework
4. We will be working in class tomorrow – Due at the end of the period
Let’s try a couple:
P=8N=8
P=1N=0
P=1N=0
KCl Calculate the electronegativity factor
K = CL =
CH4C = H=
CCl4
CO2
C16H34 (diesel fuel)
Ionic
.83.0
3.0 - .8 = 2.2
2.52.1
2.5 – 2.1 = .4 Non-polar covalent
Question Answer
What are the characteristics of Ionic Bonds?
• Usually between Metals and Nonmetals• Transfer of electrons – atoms become
IONS• Form Crystal Lattices• Brittle• High melting and boiling points• Dissolve easigly in water• Form compounds• Specific shape
Bismut
h
Crystal Lattice
Question Answer
What are the characteristics of Ionic Bonds?
• Usually between Metals and Nonmetals• Transfer of electrons – atoms become
IONS• Form Crystal Lattices• Brittle• High melting and boiling points• Dissolve easily in water• Form compounds• Specific shape
Illustrate a neutrally charged Bohr Model of an aluminum atom.
P=13N=14
2 83
Question Answer
Illustrate a positively charged Bohr Model of an aluminum atom. (3+)
Why is Al3+ considered an ion? (Look at all the subatomic particles before you answer this question.)
P=13N=14
28
Forming Sodium Chloridehttp://www.youtube.com/watch?v=upg-FUHp6yshttp://www.youtube.com/watch?v=7DjsD7Hcd9U
Before (pg. 233) After
Questions:1)Why does Sodium become an Ion? 2)Is it Positive or Negative? Why?3)Why does Chlorine become an Ion? 4)Is it Positive or Negative? Why?
Questions:1)Why do Sodium and Chlorine bond?2)What is the overall charge of the compound?3)Does NaCl have the same characteristics as Na and Cl?4)What are some unique characteristics of NaCl?
P=11 N = 12
P=11 N = 12
P=17 N = 19
P=17 N = 192
8
1
2
8
2
87
2
8
8
Question Answer
What is a covalent bond? • Valance electrons are shared• More often between nonmetal• Low melting and boiling point• Free flowing but can be brittle• Form molecules• Do not have a specific shape - flexible
C6H10O5
C12H22O11
Polar Covalent
C1
6 H3
4 die
sel fu
el
Non
pola
r covale
nt
Molecule Illustration
Explanation Electron Dot (Color Code each element)
1. What kind of bond does Hydrogen & Oxygen make? How do you know?
2. Why does one Oxygen bond with two Hydrogen atoms?
http://www.youtube.com/watch?v=ulyopnxjAZ8&feature=relmfu Drawing Lewis Dot Diagram Bonds
P=8N=8
P=1N=0
P=1N=0
1. Schedule Test #3 retake
2. Bohr Model vs. Wave Model & Lewis Dot + Electrons and
Chemical Bonding– Pgs. 1-7 – due Thursday
