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02.05 Electron Arrangement and EMR: Line Spectra Lab Worksheet
Part One (Flame Test):
1 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.
1 SolutionNameColor Description Known 1BariumLight GreenKnown 2CalciumRedKnown 3SodiumBright YellowKnown 4 RubidiumPurpleKnown 5PotassiumBlueKnown 6LithiumHot/Bubblegum PinkUnknown 1SodiumBright YellowUnknown 2PotassiumBlue

2 Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did.
3 Unknown 1 was sodium and unknown 2 was potassium. Each element has it's own color so all I did was match the element's colors I had already tested with the unknown's color.
Part Two (Spectroscopy):
1 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 HydrogenHeliumSodiumNeonMercury1Pinkish-Purple (412nm)Blue (449nm)Yellow (580nm)Purple (420nm)Blue (440nm)2Blue (444nm)Turquoise-Green (510nm)More Yellow (589nm)Green (515nm)Bluer (449nm)3Green (515nm)Yellow (587nm)Yellow-Orange (595nm)Greener (525nm)Green (540nm)4Greener (540nm)Red (691nm)Greenest (529nm)Greener (550nm)5Greenest (550nm)Redder (735nm)Yellow (579nm)Yellow-Green (570nm)6Yellow (575nm)More Yellow (583nm)Red (675nm)7Red (649nm)Red (700nm)Redder (690nm)8Redder (680nm)Redder (710nm)Reddest (705nm)9Reddest (700nm)Reddest (720nm)

2 Describe the line spectrum of the star. Give the color and wavelength value of the five brightest lines in the spectrum.
3 The spectrum of a star has a lot more wavelength values than any of the others. The five brightest lines are: Purple (415nm), Turquoise (500nm), Green (550), Yellow (585nm), Red (715nm).
Conclusion:
1 Explain, in your own words, why different elements produce different colors of light when heated. Different elements produce different colors of light when heated because each element is distinct, with different amounts of electrons. Each element also gives off a different amount of energy when heated because of the movement of the atoms.
2 Why do you think elements must be heated before they emit colored light?
3 When you put energy through an atom, electrons in the atom gain some of the energy. Because of this 'excited state', we can see the colors they make.
4 What element do you think is the most abundant in the star that you observed in Part Two? Explain your answer. Neon is probably the most abundant in the star because both the star and neon share the same colors in the spectrum.