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Observing Emission Spectra

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Chu Chu September 3, 2008 Observing Emission Spectra Different Discharge Tube Color Spectrum Original Spectrum Nitrogen Fluorescence dark orange Xenon Whitish purple Helium Fluorescence light orange Different types of salt Flame Color Spectrum Original Spectrum Barium Chloride Green Copper(l l) Chloride Greenish blue Lithium Chloride Red Potassium Chloride Purple Strontium Chloride Red 1. What is the relationship between the color of light observed and (a) the frequency of each photon of light => Photon has a particular frequency or wavelength that determines the amount of energy it contains. ...read more.


So, if one observes a color of light in the spectrum, which means that there is a certain energy, or photon. 2. (a) What is the essential difference between the spectrum seen for sunlight and the spectra seen for the salts introduced into the Bunsen flame? => The difference between the spectrum of the sunlight and the spectrum for the salts is that, the sunlight has a continuous spectrum and the salts spectrum has a line spectrum. A continuous spectrum has the entire colour, it is the rainbow. Also it contains light of all wavelengths. The line spectrum is the opposite of the continuous spectrum. ...read more.


In particular, explain clearly why this type of spectrum is referred to as a "line emission spectrum" (as opposed to an absorption spectrum, for example) and precisely what the presence of lines suggests about the arrangement and energies of electrons in atoms. => The origin of the type of spectra observed in the salt samples is the line emission spectrum. Line emission spectrum is when the electrons in the element are excited or heated. In addition, energy is emitted to its surroundings when the electrons fall back down. The presence of the lines suggests that the arrangements and energies of the electrons have been changed. Because electrons get excited and then move into different energy levels. Textbook pg. 200-207 Pictures: http://webmineral.com/help/FlameTest.shtml ...read more.

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