A photon of wavelength 200 nm strikes the surface of a metal causing an electron to be ejected with kinetic energy of 4.3 x 10-19 J. What was the threshold frequency of the metal? 5.2 x 1015 Hz 74 x 1015 Hz 1,6 x 1012 Hz 8.5 x 1014 Hz 1.2 x 1013 Hz

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Chapter1: Chemical Foundations
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A photon of wavelength 200 nm strikes the surface of a metal causing an electron to
be ejected with kinetic energy of 4.3 x 10-19 J. What was the threshold frequency of
the metal?
5.2 x 1015 Hz
74 x 1015 Hz
1,6 x 1012 Hz
8.5 x 1014 Hz
1.2 x 1013 Hz
Transcribed Image Text:A photon of wavelength 200 nm strikes the surface of a metal causing an electron to be ejected with kinetic energy of 4.3 x 10-19 J. What was the threshold frequency of the metal? 5.2 x 1015 Hz 74 x 1015 Hz 1,6 x 1012 Hz 8.5 x 1014 Hz 1.2 x 1013 Hz
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