The photoelectric work function (Ewr) of a metal is the minimum energy need to eject an electron from the surface of a metal by irradiating it with photons of light. If the energy of the photon (Ephoton) is greater than the photoelectric work function (EwF), the excess energy is absorbed by the electron 'and becomes the kinetic energy (KE ) of the electron. (KEe = Ephoton - EwF) To measure the photoelectric work function (Ewr) of an unknown metal, and to determine its identity, it is irradiated with three different wavelengths of light: • Irradiation with light with a wavelength of 240.9 nm did not eject any electrons from the surface of the metal. Irradiation with light with a wavelength of 185.4 nm cause electrons to be ejected from the surface of the metal with a velocity of 3.49 x 10° m/s. Calculate the energy of the photon (Ephoton) with a wavelength (A Jof 185.4 nm: [ Select) x 10 19 J/photon Calculate the Kinetic Energy (KE.) of the ejected electron: [ Select) x 10 19 J/electron Calculate the photoelectric work function (Ewr) of the metal: [ Select] v x 10 19 J Identify the metal: [ Select ) Metal: Photoelectric Work Function Uranium 5.767 x 1019 J Cadmium 6.521 x 1019 J Niobium 6.889 x 10 19 J Cobalt 8.011 x 1019 J Platinum 10.174 x 1019 J Calculate the velocity of the electrons (Ve) that would be ejected from this metal surface when it is irradiated with photons with wavelengths of 91.3 nm. velocity (Ve) = [Select] x 10° m/s
The photoelectric work function (Ewr) of a metal is the minimum energy need to eject an electron from the surface of a metal by irradiating it with photons of light. If the energy of the photon (Ephoton) is greater than the photoelectric work function (EwF), the excess energy is absorbed by the electron 'and becomes the kinetic energy (KE ) of the electron. (KEe = Ephoton - EwF) To measure the photoelectric work function (Ewr) of an unknown metal, and to determine its identity, it is irradiated with three different wavelengths of light: • Irradiation with light with a wavelength of 240.9 nm did not eject any electrons from the surface of the metal. Irradiation with light with a wavelength of 185.4 nm cause electrons to be ejected from the surface of the metal with a velocity of 3.49 x 10° m/s. Calculate the energy of the photon (Ephoton) with a wavelength (A Jof 185.4 nm: [ Select) x 10 19 J/photon Calculate the Kinetic Energy (KE.) of the ejected electron: [ Select) x 10 19 J/electron Calculate the photoelectric work function (Ewr) of the metal: [ Select] v x 10 19 J Identify the metal: [ Select ) Metal: Photoelectric Work Function Uranium 5.767 x 1019 J Cadmium 6.521 x 1019 J Niobium 6.889 x 10 19 J Cobalt 8.011 x 1019 J Platinum 10.174 x 1019 J Calculate the velocity of the electrons (Ve) that would be ejected from this metal surface when it is irradiated with photons with wavelengths of 91.3 nm. velocity (Ve) = [Select] x 10° m/s
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
Related questions
Question
100%
Hi! Needing help with this question. Thanks!
![The photoelectric work function (Ewr) of a metal is the minimum energy need to eject an electron from the surface of a metal by irradiating it with photons of light.
If the energy of the photon (E,hoton) is greater than the photoelectric work function (Ewr), the excess energy is absorbed by the electron and becomes the kinetic energy (KE. )
of the electron.
(KE. = Ephoton - EwF)
To measure the photoelectric work function (Ewr) of an unknown metal, and to determine its identity, it is irradiated with three different wavelengths of light:
- Irradiation with light with a wavelength of 240.9 nm did not eject any electrons from the surface of the metal.
- Irradiation with light with a wavelength of 185.4 nm cause electrons to be ejected from the surface of the metal with a velocity of 3.49 x 10 m/s.
Calculate the energy of the photon (Ephoton) with a wavelength (A Jof 185.4 nm:
(Select]
x 10 19 J/photon
Calculate the Kinetic Energy (KE.) of the ejected electron:
(Select ]
x 10 19 J/electron
Calculate the photoelectric work function (EwF) of the metal:
[ Select)
v x 10 19 J
Identify the metal:
(Select]
Metal:
Photoelectric Work Function
Uranium
5.767 x 1019 J
Cadmium
6.521 x 10 19 J
Niobium
6.889 x 10-19 J
Cobalt
8.011 x 10 19 J
Platinum
10.174 x 10 19 J
Calculate the velocity of the electrons (Ve) that would be ejected from this metal surface when it is irradiated with photons with wavelengths of 91.3 nm.
v x 10° m/s
velocity (Ve) = [Select]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F66173c1a-f883-4b2a-9c4a-34112153fb2f%2F4e91aa83-2b2e-44ab-bfd1-c39f5ae32e9f%2Fz51bzcb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The photoelectric work function (Ewr) of a metal is the minimum energy need to eject an electron from the surface of a metal by irradiating it with photons of light.
If the energy of the photon (E,hoton) is greater than the photoelectric work function (Ewr), the excess energy is absorbed by the electron and becomes the kinetic energy (KE. )
of the electron.
(KE. = Ephoton - EwF)
To measure the photoelectric work function (Ewr) of an unknown metal, and to determine its identity, it is irradiated with three different wavelengths of light:
- Irradiation with light with a wavelength of 240.9 nm did not eject any electrons from the surface of the metal.
- Irradiation with light with a wavelength of 185.4 nm cause electrons to be ejected from the surface of the metal with a velocity of 3.49 x 10 m/s.
Calculate the energy of the photon (Ephoton) with a wavelength (A Jof 185.4 nm:
(Select]
x 10 19 J/photon
Calculate the Kinetic Energy (KE.) of the ejected electron:
(Select ]
x 10 19 J/electron
Calculate the photoelectric work function (EwF) of the metal:
[ Select)
v x 10 19 J
Identify the metal:
(Select]
Metal:
Photoelectric Work Function
Uranium
5.767 x 1019 J
Cadmium
6.521 x 10 19 J
Niobium
6.889 x 10-19 J
Cobalt
8.011 x 10 19 J
Platinum
10.174 x 10 19 J
Calculate the velocity of the electrons (Ve) that would be ejected from this metal surface when it is irradiated with photons with wavelengths of 91.3 nm.
v x 10° m/s
velocity (Ve) = [Select]
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 5 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY