9:39 AM Old Dominion University iPad 100% w Question Completion Status: QUESTION

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9:39 AM Old Dominion University iPad 100% w Question Completion Status: QUESTION 5 2 points Save Answer Determine the wavelength of light emitted or absorbed by a hydrogen atom when an electron transitions from n-2 to n·7. Give your answer in units of nm. QUESTION 6 2 points Save Answer When holding the diffraction grating to observe the visible spectra, in what orientation should it be held? (Your answer should only be a single word.) QUESTION 7 2 points Save Answer When collecting the spectra of hydrogen and mercury, where should the end of the optical fiber be held? OA Near the narrow region of mercury and at the fat end of the hydrogen. OB. By the fat end of both. C. Near the middle of the narrow region for both. D. Near the narrow region of hydrogen and at the fat end of mercury. QUESTION 8 2 points Save Answer What correctly describes the relationship between the spectrum of one atom and the spectrum of another? OA The visible lines are identical for all atoms; however, their intensities vary due to the electronic structure of the atom. they have unique wavelengths. wavelength either to higher or lower wavelengths due to the number B. The number of visible spectral lines are identical for atoms; however, ° C. The spectra are similar, however, the lines are offset by a certain of nrntons in the nearleis of the atnms Click Save and Submit to sove and submit. Click Save AN Answers to save al answers. Save All Answers Close Window Save and Submit

Explanation / Answer

5)

Since electron is moving from lower level to higher level, light will be absorbed and not emitted

Here photon will be captured and it will excite the atom

1/wavelength = -R* (1/nf^2 - 1/ni^2)

R is Rydberg constant. R = 1.097*10^7

1/wavelength = - R* (1/nf^2 - 1/ni^2)

1/wavelength = - 1.097*10^7* (1/7^2 - 1/2^2)

wavelength = 3.996*10^-7 m

wavelength = 400 nm

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