When a metal is exposed to 4.78×10² nm blue radiation, it emits an electron with kinetic energy 0.309 eV. What is the threshold frequency for this metal? (1.000 eV = 1.602×10-19 J)

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Chapter1: Chemical Foundations
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When a metal is exposed to
4.78×102 nm blue radiation,
it emits an electron with
kinetic energy 0.309 eV.
What is the threshold
frequency for this metal?
(1.000 eV = 1.602×10-19
J)
Provide your answer in E-
notation rounded to three
significant figures.
Transcribed Image Text:When a metal is exposed to 4.78×102 nm blue radiation, it emits an electron with kinetic energy 0.309 eV. What is the threshold frequency for this metal? (1.000 eV = 1.602×10-19 J) Provide your answer in E- notation rounded to three significant figures.
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