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02.05 Electron Arrangement and EMR

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cheyenne leksell

on 13 July 2014

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Transcript of 02.05 Electron Arrangement and EMR

02.05 Electron Arrangement and EMR
By: Cheyenne Leksell
Part 1: Flame Test
Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame.
SOLUTION
NAME
KNOWN 1
KNOWN 2
KNOWN 3
KNOWN 4
KNOWN 5
KNOWN 6
UNKNOWN 1
UNKNOWN 2
Barium
CALCIUM
SODIUM
RUBIDIUM
POTASSIUM
LITHIUM
SODIUM
POTASSIUM
Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did.
The first unknown solution was sodium, while the second was potassium. I know this because when viewing the unknown solutions, their results were consistent with those of the known solutions of sodium and potassium.
Part Two (Spectroscopy)
Create and complete a data table for Part Two of the lab. It should include the name of the element, the colors, and the wavelength values of the observed lines.
1
2
3
4
5
6
7
8
9
10
Hydrogen Helium Sodium Neon Mercury
Purple - 415
Blue - 440
Green - 510
Green Yellow
- 540
Yellow Green
- 550
Yellow - 575
Red - 655
Redder - 680
Reddest - 700
Blue - 500
Blue Green - 500
Yellow - 590
Red - 690
Redder - 735
Yellow - 585
Yellow - 580
Yellower - 585
Yellowest - 595
Teal - 490
Green - 550
Red - 710
Purple - 420
Aqua - 510
Green - 520
Greener - 525
Yellow - 575
Yellower - 595
Reddish - 700
Red - 705
Redder - 720
Reddest - 745
Purple - 415
Blue - 500
Green - 540
Green Yellow
- 550
Yellow - 570
Red - 675
Redder - 690
Reddest - 705
Part Two (Spectroscopy)
CONTINUED

Describe the line spectrum of the star. Give the color and wavelength value of the five brightest lines in the spectrum.
The line spectrum's colors range from purple through red, purple being the beginning color and reddest being the final color.
Wavelengths and Colors of the Five Brightest Lines
Color
Wavelength
Purple
Teal
Green
Yellow
Red
415 NM
490 NM
550 NM
585 NM
710 NM
Conclusion
1. Explain, in your own words, why different elements produce different colors of light when heated.
The elements produce different colors of light when heated because the many different electrons have different levels of energy. Kinetic energy is released as the electrons return to their original positions, causing light to be produced. Distance and the number of electrons determine the color of the light.
2. Why do you think elements must be heated before they emit colored light?
In order for elements to emit colored light, they must first reach their maximum potential energy. This is the outer-most electron ring. For the elements to reach this, the electrons must first be heated.
3. What element do you think is the most abundant in the star that you observed in Part Two? Explain your answer.
I believe neon is the most abundant in the stars that were observed in part 2. This is because its color contains every other color found in the spectrum.
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