Monday October 28 th , 2013
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Transcript of Monday October 28 th , 2013
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Monday October 28th, 2013
Entry Task/Warm-Up
• Please take your notebook and your homework
Due Today:
• Word Splash and Find that Element Worksheet
Homework:
1. Bohr Structure Practice due Tuesday 10/29/2013 for 20 points
Schedule:
• Notes: How to construct a Bohr Structure
Objective: I can identify and construct Bohr and Lewis Structures
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Bohr Diagrams Review1) Draw a nucleus with the
element symbol inside.
2) Carbon is in the 2nd period, so it has two energy levels, or shells.
3) Draw the shells around the nucleus.
CC
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Bohr Diagrams Review
1) Add the electrons.
2) Carbon has 6 electrons.
3) The first shell can only hold 2 electrons.CC
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Bohr Structure1) Since you have 2 electrons
already drawn, you need to add 4 more.
2) These go in the 2nd shell.
3) Add one at a time -starting on the right side and going counter clock-wise.
CC
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Bohr Diagrams
Try the following elements on your own:
a) H
b) He
c) O - 8 electrons
d) Al
e) Ne
f) K
OO
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Bohr Diagrams
Try the following elements on your own:
a) H
b) He
c) O
d) Al - 13 electrons
e) Ne
f) K
AlAl
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Bohr Diagrams
Try the following elements on your own:
a) H
b) He
c) O - 8 electrons
d) Al
e) Ne
f) K
OO
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1) Check your work.
2) You should have 6 total electrons for Carbon.
3) Only two electrons can fit in the 1st shell.
4) The 2nd shell can hold up to 8 electrons.
5) The 3rd shell can hold 18, but the elements in the first few periods only use 8 electrons.
CC
Bohr Diagrams Review
Complete Atomic Basic Worksheet
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Bohr Diagrams
Try the following elements on your own:
a) H
b) He
c) O
d) Al - 13 electrons
e) Ne
f) K
AlAl
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Tuesday, October 29th, 2013
Entry Task/Warm-Up
• Please take your notebook and your homework
Due Today:
• Bohr Structure Practice
Homework:
1. Lewis Structure Practice Wed/Thurs 10/30-10/31 for 27 Points
Schedule:
• Notes: Lewis Structures
Objective: I can differentiate between chemical and physical properties
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Lewis Structures Review
• Find out which group (column) your element is in.
• This will tell you the number of valence electrons your element has.
• You will only draw the valence electrons.
www.chem4kids.com
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Lewis Structures Review1) Write the element symbol.
2) Carbon is in the 4th group, so it has 4 valence electrons.
3) Starting at the right, draw 4 electrons, or dots, counter-clockwise around the element symbol.
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Lewis Structures Review1) Check your work.
2) Using your periodic table, check that Carbon is in the 4th group.
3) You should have 4 total electrons, or dots, drawn in for Carbon.
Complete Lewis Structure Notes Worksheet and
Atomic Basic WorksheetSHOW FOR A STAMP WHEN DONE!
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Lewis Structures Homework Assignment
On a sheet of paper draw Lewis Structures for the following elements:
Hydrogen, Barium, Silicon, Neon, Oxygen, Sulfur, Iodine, Magnesium, Aluminum, Potassium, Bromine, Arsenic, Fluorine, Sodium, Calcium, Strontium, Rubidium, Cesium, Xenon, Indium, Tin, Selenium, Tellurium.
Draw Bohr Structures for the following elements:
Boron, Sulfur, Hydrogen and Magnesium
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Wed/Thurs 10/30-10/31/2013Entry Task/Warm-Up
• Please take your notebook and your homework
Due Today:
• Lewis Structure Practice
Homework:
1. Physical vs. Chemical Properties Worksheet due Friday 11/1/2013 for 15 Points
Schedule:
• Notes: Physical and Chemical Changes
Objective: I can differentiate between chemical and physical properties
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Atomic Basics Worksheet!! You will have 30 minutes in class to complete this assignment.
It will be TURNED IN FOR A GRADE, not on your stamp sheet.
When you are finished, bring it up to Ms. Andrews’ desk and find something quietly to do for the remainder of the time
This assignment is worth 25 points before the end of the hour, if it is not finished, TURN IT IN TORMORROW FOR LATE CREDIT!!
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Physical Property
Characteristic of a pure substance that can be observed WITHOUT changing it into another substance.
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Physical Properties of Matter• It does NOT CHANGE into something
else
• Examples
color
shape
taste
state/phase
densityD = m V
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Physical Change• a change in shape, size, color, or state• a change without a change in chemical
composition
• a change that is reversible• The Mixtures Lab
• Examplestearing paper
cutting your hair change in state
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Chemical Property
A characteristic of a pure substance that describes its ability to change into a DIFFERENT substance.
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Chemical Properties of Matter• changes into a new substance
• Examples
flammability
reactivity with vinegar
reactivity with oxygen
Iron + Oxygen Iron oxide (rust)2Fe + 3O2 Fe2O3
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Chemical Change
• a change in which a substance becomes another substance having different properties
• a change that is not reversible using ordinary physical means
• Changes that usually cause heat, sound, light, odor, fizzing/foaming, color changes
• Examples
combining sulfuric acid and sugar
burning a piece of wood
soured milk
Salt: http://www.schooltube.com/video/2fa9cb3e39064832b31d/Reaction-of-Sodium-and-Chlorine
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Chemical or Physical Property?
1. Paper is white
2. Boiling point of H2O is 100oC
3. Zinc reacts with hydrochloric acid and creates hydrogen gas
4. Nitrogen does not burn
5. Sulfur smells like rotten eggs
Physical Property
Physical Property
Physical Property
Chemical Property
Chemical Property
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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).
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Comparing Physical and Chemical Properties
Substance/Matter Physical Property Chemical Property
Helium Less dense than air Nonflammable
Wood Grainy texture Flammable
Baking soda White powder Reacts with vinegar to produce bubbles
Powdered sugar White powder Does not react with vinegar
Rubbing alcohol Clear liquid Flammable
Red food coloring Red color Reacts with bleach and loses color
Iron Malleable Reacts with oxygen
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Chemical or Physical Change?
1. Bending a Paper Clip
2. Baking a cake
3. The sublimation of carbon dioxide
4. Crushing an aluminum can
5. Vinegar and baking soda combining to create salt and water
Physical Change
Chemical Change
Chemical Change
Physical Change
Physical Change
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Friday 11/8/2013
Entry Task/Warm-Up
• Please take your notebook and your homework
Due Today:• Physical and Chemical
Changes Worksheet
Homework:1. Review notes for Quiz on
Tuesday 11/5/2013!!!
2. Matter Crossword Puzzle due Monday 11/4/2013 20 Points
3. States of Matter Note Page for 10 Points due 11/4/2013
Schedule:• Notes: 4 States of
Matter• Grade Checks
Objective: I can differentiate between the four states of matter
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4 Physical States of Matter
•Solid •Liquid•Gas
•Plasma
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Solid
• Particles are tightly compact
• Particles vibrate without the ability to move freely
• Definite shape and volume
• Solid Animation
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Liquid
• Particles are tightly compact, but able to move around close to each other
• No definite shape, but definite volume
• Liquid Animation
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Gas
• Particles can easily spread out or move close together
• Particle move freely and with a lot of energy
• No definite shape or volume
• Gas Simulation
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Plasma
• Exist at extremely high temperatures (several million degrees Celsius)
• Particles are broken apart• Particles move freely and
with extremely high energy
• This form is not too common on Earth, however it is the most common form of matter in the universe
• No definite shape or volume (?)
• Examples: Florescent and neon lights, lightning, aurora borealis
-
-
-
Why do you think this is the most common form/state of matter in the universe?
++
+
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States of Matter Diagram
http://www.youtube.com/watch?v=vDZhUkp30tE
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States of Matter Continuum
Taken from: http://www.chem4kids.com/files/matter_becondensate.html
What about this continuum could be considered a little misleading?
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Mass vs. WeightMass
• a measure of how much matter an object is made of
• does not change, regardless of where something or someone is
Weight
• the force of gravity on an object
• equal to the mass of the body times the local acceleration of gravity
http://www.exploratorium.edu/ronh/weight/index.html
Why do you think the person ’s weight is less on the moon?Mass = 59 kg Mass = 59 kg
Weight = 579 N Weight = 96 N
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Density
• a measure of the amount of matter present in a given volume of a substance
• typically expressed in the following units:– grams per cubic centimeter (g/cm3) for solids– grams per milliliter (g/ml) for liquids
• can change as temperature and pressure change
Which do you think is more dense? Why?
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The Density Triangle
D V
m
.
D = m VV = m D
m = D V
.
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Calculating Density
• Density can be calculated by dividing the mass of an object by its volume
D = m V
Sample ProblemTimothy found a solid metal blockthat has a mass of 100 grams and a volume of 25 cm3. What would bethe density of the block?
D = =
100 grams25 cm3
4 grams cm3
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Practice Problems
1. Find the density of a substance with a mass of 27 g and a volume of 7 cm3.
2. A block of maple has a mass of 20 grams and a volume of 26.5 cm3. What is the density of the block?
D = m V
D = m V
D =
=27 g7 cm3
3.86 grams cm3
D =
20 grams26.5 cm3
= 0.75 grams cm3
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Monday 11/4/2013
Entry Task/Warm-Up
• Please take your notebook and your homework
Due Today:• Nothing due Today!!
Homework:1. Review notes for Quiz
TOMORROW Tuesday 11/5/2013!!!
2. Lewis Structure due Tuesday 11/5/2013 for 20 Points
3. Chemistry Web due TODAY 11/5/2013 TURNED IN FOR 35 POINTS
Schedule:• Review Day!! • Activity: Mind Map and Lewis
Structure
Objective: I can differentiate between the different states of matter
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Tuesday 11/5/2013Entry Task/Warm-
Up• Please take your
notebook and your homework
Due Today:• Lewis Structure Review
• Chemistry Web turned in for a late grade of 29/35!
Homework:1. No homework today!
2.Chemistry Exam Friday 11/15/2013
Schedule:• Quiz Today!!
Objective: I can differentiate between the different states of matter
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Wed/Thursday 11/6-11/7/2013
Entry Task/Warm-Up
• Please take your notebook and your homework
Due Today:• Nothing is due
today!!
Homework:1. Finish Tasty Solutions Lab
Write Up due Today 11/7/2013!!!
Schedule:• Notes: Solutions and
Mixtures• Lab: Tasty Solutions
Objective: I can differentiate between the different mixtures and solutions
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SolventPart of the solution that is present in largest amount
and dissolves a solute
What liquid is called the “universal solvent”? WATER
Solvent - Solute - Solution
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Solute
Part of solution present in lesser amount and dissolved by solvent
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SolutionA well mixed mixture containing a solvent and at
least one solute that has the same properties throughout.
Tasty solution activity
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Mixture
Made of two or more substances- elements, compounds or both- that are together in the same place but are not chemically combined.
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Heterogeneous Mixture
You can see the different parts
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Homogeneous Mixture
So evenly mixed that you can’t see the different parts
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Heat- transfer of energy
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Exothermic- heat energy EXITS the system
- ex. Combustion, burning
http://www.graspr.com/videos/potassium-permanganate-and-glycerine-2
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SaltAn example of an exothermic reaction is the mixture of sodium metal and chlorine gas which yields table salt.
2Na(s) + Cl2(g) 2NaCl(s) + energy
http://www.schooltube.com/video/2fa9cb3e39064832b31d/Reaction-of-Sodium-and-Chlorine
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Endothermic- heat energy ENTERS the system
- surroundings usually feel cooler
ex. Cold packs, melting ice
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Tasty Solutions LabProcedure:
Step 1: Place one piece of candy in your mouth and allow it to dissolve without using your tongue or teeth to help! Record the time
it takes for the candy to dissolve in the chart.
Step 2: Place another piece of candy in your mouth and allow it to dissolve using only your tongue to move it around. Record the time it takes for
the candy to dissolve in the chart.
Step 3: Place another piece of candy in your mouth and allow it to dissolve using your tongue and teeth. Record the time it
takes for the candy to dissolve in the chart.
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Tasty Solutions LabLab Write-Up
1.You are to answer every question in complete sentences on a separate sheet of paper
2.Record time in seconds
3.When constructing your graph, be sure to include: key, color, labels, x and y axis and titles
4.Question #2: Explain your reasoning for your answers 2-3 sentences
5.Question #4: Answer question, and explain why in 4-5 sentences
6.Question #5: Answer in 4-5 sentences
7.Add question #6: Did your dissolving time increase or decrease? Explain why this may have happened. Answer in 5-7 sentences
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Friday 11/8/2013Entry Task/Warm-
Up• Please take your
notebook and your homework
IMPORTANT DATES!!• Stamp Sheet due
Wednesday/Thursday 11/13-11/14
• Notebook Check Next week!
• Chemistry Exam Friday!!
Homework:1. Stamp Sheet due
Wed/Thurs!
2. Chemistry Exam Friday 11/15/2013
3. NO SCHOOL MONDAY!
Schedule:• Periodic Packet due Tuesday
11/12/2013 for 30 Points
• Grade Check Today!
Objective: I can differentiate between the different states of matter
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Tuesday 11/12/2013
IMPORTANT DATES!!• Stamp Sheet due Friday
11/18/2013!!
• Notebook Check Next week!
• Review Guide due Friday!!
• Chemistry Exam Friday!!
Homework:1. Study your notes and
vocabulary!
2.Chemistry Exam Friday 11/15/2013
Schedule:• Finish Periodic Table
packet!!• Due Today for 30 Points!!
Objective: I can differentiate between the different states of matter
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Wednesday/Thursday 11/20-11/21
IMPORTANT DATES!!
• Stamp Sheet due Friday!!
• Notebook Check TODAY!
• Review Guide due Friday!!
• Chemistry Exam Friday!!
Homework:1. Chemistry Review Guide
due Friday 11/15/2013 for 50 Points
2.Chemistry Exam Friday 11/15/2013
Schedule:• Chemistry Unit Review
Guide
Objective: I can differentiate between the different states of matter
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Friday 11/15/2013
Due Today:
• If you have not turned in your STAMP SHEET, please do so by the end of the period!
• Study Guides due Today!!
Homework:1. No homework today!
Schedule:• Chemistry Exam Today!!
Objective: I can differentiate between the different states of matter