AtomicSpecLab - Chem. 124 Winter 2007 Dr. Berber Name:...

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Chem. 124 Winter 2007 Dr. Berber Name: Computer # Partner:
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Chem. 124 Winter 2007 Dr. Berber Atomic Spectra Part 1. Original Data: Calibration of Spectroscope using the Mercury Lamp Part 2: Calculations & Results: Emission Spectra of Various Lamps Lamp Spectroscope Reading (observed) Wavelength (calculated) Hydrogen Violet – 11.5 343 nm Indigo – 8.5 405 nm Red – 2 540nm Helium Violet – 14 291 nm Indigo – 11 353 nm Yellow – 3 520 nm Red – -1 603 nm Neon Green – 2 540 nm Yellow – 2.5 530 nm Orange – 1 561 nm Red – -1.5 613 nm Violet – 12 332 nm
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Chem. 124 Winter 2007 Dr. Berber Argon Indigo – 10 374 nm Orange – -4 665 nm Red – -5 686 nm Show a sample calculation illustrating how you calculated the wavelength of one of your observed lines from hydrogen. y = -0.048x + 28.01 So x= [(y-28.01)/-0.048] Y= Violet (11.5) X=[(11.5-28.01)/-0.048] X= 343nm= λ Bohr Transition Predicted Energy Predicted Wavelength (nm) Observed Wavelength (nm) n = 6 to n = 2 -4.85 x 10 -19 J 410 nm Indigo- 405 nm n = 5 to n = 2 -4.58 x 10 -19 J 434 nm N/A n = 4 to n = 2 -4.09 x 10 -19 J 486 nm N/A n = 3 to n = 2
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AtomicSpecLab - Chem. 124 Winter 2007 Dr. Berber Name:...

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