The binding energy of electrons to a chromium metal surface is 7.21 × 10-19 J. a. What is the longest wavelength of light (in nm) that will eject electrons from chromium metal? b. What frequency is required to give electrons with kinetic energy of 6.72E-19 J? c. What wavelength (in nm) is required to give electrons with kinetic energy of 6.72E-19 J?

Chemistry by OpenStax (2015-05-04)
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Chapter6: Electronic Structure And Periodic Properties Of Elements
Section: Chapter Questions
Problem 28E: Consider a large number of hydrogen atoms with electrons randomly distributed in the n = 1, 2, 3,...
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The binding energy of electrons to a chromium metal surface is

7.21 × 10-19 J.

a. What is the longest wavelength of light (in nm) that will eject electrons from chromium metal?

b. What frequency is required to give electrons with kinetic energy of 6.72E-19 J?

c. What wavelength (in nm) is required to give electrons with kinetic energy of 6.72E-19 J?

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