Last modified: Wed 12/31/1969 06:00:00 pm ACA

It is OK to use your textbook or lecture notes from class, but if you can answers the questions without it that is OK too.

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.

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1. Below are images showing the color of gas discharge tubes for the noble gases.


Go to the link at the University of Arizona site run by Dr. Vincente Talaquer. Look at the emission spectra for He, Ne and Ar and determine which element has the most complicated emission spectrum. If your computer will not open the applet I recommend that you try a different computer. If your computer will not open the applet try this link.

(provide the symbol of the element with the most complicated emission spectrum.)

2.The wavelength of orange light is 6 x 10-7 m (600 nm) and for blue light the wavelength is 4.6 x 10-7 m (460 nm). Which color has the longer wavelength?


3. Use the relationship between wavelength and frequency

and calculate the frequency of blue light with a wavelength of 460 nm. (Using scientific notation you must enter the number differently. A number like 1.00 x 1019 would be entered at 1.00e19.)


4. One of the lines in the emission spectrum of hydrogen has a frequency of 4.58 x 1014 s-1. Calculate the wavelength, in nanometers, of this emission line.


5. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

6. If there is one question you would like to have answered in lecture, what would that question be?