The work function of a metal is 9.4 electron-volts (eV). What is the frequency of a photon which ejects an electron from this surface at 420 km/s? Now, consider the image attached of the photoelectric effect. Can you illustrate the photoelectric effect for Cobalt and label each aspect of the picture? This question is part of the guide to solving the question above.

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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The work function of a metal is 9.4 electron-volts (eV). What is the frequency of a photon which ejects an electron from this surface at 420 km/s?

Now, consider the image attached of the photoelectric effect. Can you illustrate the photoelectric effect for Cobalt and label each aspect of the picture? This question is part of the guide to solving the question above.

Ephoton
= hy
Vmax = 6.22x10° m/s
700 nm
1.77 ev
550 nm
Vmax = 2.96x10 m/s
2.25 ev
400 nm
3.1 ev
no
electrons
Potassium - 2.0 ev needed to eject electron
Photoelectric effect
(1 eV = 1.6 x 10-19 J)
Transcribed Image Text:Ephoton = hy Vmax = 6.22x10° m/s 700 nm 1.77 ev 550 nm Vmax = 2.96x10 m/s 2.25 ev 400 nm 3.1 ev no electrons Potassium - 2.0 ev needed to eject electron Photoelectric effect (1 eV = 1.6 x 10-19 J)
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