Introduction to the density functional formalism and some illustrative ...
Introduction to Density
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Transcript of Introduction to Density
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Changing Seats
TODAY!
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1.MANAGER– Organizing, Understanding, Turning in Work
2. MATERIALS MANAGER– Collecting, Keeping supplies in good condition, Returning, Organize Table Box
3. TIMER/DESIGNER– Track and Communicate Time, In charge of design, sketching and quality of product
4. ORAL PRESENTER– Communicator, Asks Questions for the group, Presents finding, Manages Trades
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Class NotesTopic: ________________________Questions/Main Ideas:
Name ________________________________________ Class ________________________________________ Period ________________________________________
Date _____________________________________Notes:
Intro to Density
1. What is mass effected by?
2. Will changing the volume change the density?
How tightly packed the particles are in a substance.
vs.
A block of iron has very tightly packed particles compared to a block of aluminum.
NO. Density is a RATIO between mass and volume….the particles remain packed the same way no matter what the size of the sample.
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3. What does DENSITY measure?
4. What are three ways to find volume?
Density measures the amount of particles (mass) in a certain space (volume).
vs.
Which is wood? Which is iron? Why?
1) Use a G.C.2) bxh3) displacement
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6. How do you know where to put each number variable in the formula?
‘
7. Will changing the volume change the mass?
Yes. You will have more particles so more mass. BUT the density is the same.
5. What is the Density Formula?
D = m/v
• IDENTIFY # by UNIT LABEL• Mass #’s = GRAMS• Volume #’s = mL, cm3, cc or
any Liter or Cubic unit• Density #’s = Combination unit
labels: g/mL or g/cm3 or g/cc
vs
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The length is 3 cm the width is 4 cm and the height is 5 cm.
The length is 4 dm, the width is 6 dm and height is 9 dm. The volume is?
The length is 10 m, the width is 4 meters the height is 7 meters. The volume is?
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Sample Chemical Symbol
Density g/cm3
Physical Attribute
Lead Pb 11.3 Heaviest Mass
Copper Cu 8.9 Orange
Iron Fe 7.9 Magnetic/Rusts
Brass Cu & Zn 8.6 Yellow
Aluminum
Al 2.7 Lightest Mass
Zinc Zn 7.1 Dull Gray
Copy chart onto Cornell Notes
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Substance Mass g
Volume cm3
Densityg/cm3
4. Cube 1
5. Cube 2
6. Cube 3
7. Cube 4
8. Cube 5
9. Cube 6
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Please Circle EITHER Same or Different….then complete the Sentence.
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Answer in complete sentences:
8. How is Density useful in identifying substances? Explain why a substance, such as gold, cut into different sizes, would have the same density.
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1. Introduction to Density + Cornell Notes- Due Wednesday
2. Corrections+ Parent Signature on Test #2 – Due Friday
End of the Quarter is Friday.