4-30. he threshold frequency of a metal can be determined from measurements of the speed of the ejected electrons. Electrons were ejected from a metal with a speed of 5.00 x 105 m-s¹ when irradiated by light having a wavelength of 390.0 nm. Determine the threshold frequency of this metal.

4-30. he threshold frequency of a metal can be determined from measurements of the speed of the ejected electrons. Electrons were ejected from a metal with a speed of 5.00 x 105 m-s¹ when irradiated by light having a wavelength of 390.0 nm. Determine the threshold frequency of this metal.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter5: Electron Configurations And The Periodic Table

Section: Chapter Questions

Problem 114QRT

See similar textbooks

Related questions

Q: What is the frequency of a particle of wavelength 752.4 nm?

A: Given Wavelength = 752.4 nm 1 nm = 10-9 meter 752.4 = 752.4 × 10-9 meter Hence…

Q: A photon with a wavelength of 1681 nm was emitted from a hydrogen atom as an electron "fell" from…

A: Given- Wavelength of photon = 1681 nm Initial energy level = 11 To find Final energy level

Q: Assuming that the smallest measurable wavelength in an experiment is 0.270 fm, what is the maximum…

A: The mass is calculated by using the following equation.

Q: A proton travels through space with an effective wavelength of 3.00 x 10^-12m? What is its speed?

A: Electromagnetic spectrum involves different radiations from the lowest to the highest frequency…

Q: What is the frequency of a photon that is absorbed when a hydrogen atom undergoes a transition from…

A: Rydberg formula: The wavenumber for the transition in the hydrogen atom can be calculated from the…

Q: To resolve an object in an electron microscope, the wavelength of the electrons must be close to the…

Q: Determine the energy of a photon with a wavelength of 404 nm.

A: Energy of a Photon is 4.92x10-19J

Q: The quantum yield of light-induced chemical reactions (called photochemical reactions) measures the…

A: Interpretation - The maximum amount (in moles) of CH3X that breaks apart is to be explained.…

Q: The red lasers used to read the barcodes of products at the grocery stores produce light with a…

A: Energy of a photon E = hcλ where, h = plank's constant = 6.63×10-34kg m2s c = speed of light =…

Q: 4) Below is a very nice line spectrum of a fluorescent light. It consists of peaks in the areas of…

A: Solution: The wavelengths given are Violet , Blue ,Green,Yellow and Red. When They are emitted…

Q: How fast must a 142-g baseball travel in order to have ade Broglie wavelength that is equal to that…

A: Given : mass of baseball = 142 g And wavelength of baseball = λ = wavelength of a X-ray photon = 100…

Q: Find the velocity of an electron ejected by a metal whose threshold frequency is 2.25 x 1014 s-1…

A: Given, Threshold frequency = fo = 2.25 x 1014 s-1 Wavelength of visible light = λ = 515.5 nm Find…

Q: A proton in a linear accelerator has a de Broglie wavelength of 122pm. What is the speed of the…

Q: cientific notation rounded to three significant figures.

A: Given, Wavelength (L) = 220 nm = 220×10-9 m Energy(E) = hc/L = 6.626×10-34 × 3 ×108/220×10-9 =…

Q: What is the average speed of a beam of hydrogen atoms if they have a wavelength of 125 pm? Mass of a…

Q: The resolution limit of a microscope is roughly equal to the wavelength of light used in producing…

Q: A sample of excited atoms lie 3.054×10−19 J3.054×10−19 J above the ground state. Determine the…

A: The energy associated with an electromagnetic radiation is equal to hv where h is the Planck’s…

Q: Determine the velocity of a medicine ball (m = 10.0 kg) with a wavelength of 1.33 × 10-35 m.

Q: Calculate the wavelength in nm of 5.14 x 10¹4 s-1 light. Do not report units in your answer. Report…

Q: To resolve an object in an electron microscope, the wavelength of the electrons must be close to the…

A: Given, Diameter = 3.10nm Mass of an electron = 9.11×10−31 kg

Q: Assuming that the smallest measurable wavelength in an experiment is 0.890 fm0.890 fm , what is the…

A: The expression for calculating the de Broglie wavelength is as follows,…

Q: A proton travels through space with an effective wavelength of 3.00x10^-12 m. What is its speed?

A: The de Broglie equation of wavelength is given below.

Q: Alejandra just finished making her hydrogen calibration curve. Her data is best described by the…

A: Scale reading on X axis Wavelength (nm) on Y axis

Q: Calculate the energy of a photon of light of the frequency of 5.6 х 1014 Hz

Q: How fast must a 144.9−g baseball travel in order to have a de Broglie wavelength that is equal to…

A: De-Broglie equation is given as,

Q: The reciprocal of the wavelength for one of the emissions from an excited hydrogen at is found to be…

Q: For a hydrogen atom, calculate the wavelength of light (in m) that would be emitted for the orbital…

Q: An electron in a hydrogen atom relaxes to the n = 4 level, emitting light of 114 THz. What is the…

Q: The threshold frequency of a metal can be determined from measurements of the speed of the ejected…

Q: A proton in a linear accelerator has a de Broglie wavelength of 122 pm. What is the speed of the…

Q: Be sure to answer all parts How fast must a 143.9−g baseball travel in order to have a de Broglie…

A: Given data, Mass of baseball = 143.9 g de Broglie wavelength = 75.0 pm

Q: Calculate the energy of a photon that has a wavelength of 91.1 nm. Recall that 1 m = 109 nm.

A: Energy = 2.18x10-18J

Q: Calculate the frequency of a photon with energy of 5.38 x 1017 J. Select the correct answer: Oa.…

A: Energy of photon = 5.38 × 10-17 J Frequency = ?

Q: wavelength

Q: 2. Given that the speed of light is 3.0 x 108 m s1,, show that the frequency of blue light having a…

A: Given speed of light = 3.0 ×1088m/sec Wavelength = 480nm 1nm = 10-9 m Formula used Wave number =…

Q: A 100. W lamp emits red light of wavelength 680 nm. How many photons can the lamp generate in 26…

A: This problem this problem is based on Planck's Quantum theory E = hλc where the symbols have their…

Concept explainers

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.

Question

4-30. The threshold frequency of a metal can be
determined from measurements of the speed of
the ejected electrons. Electrons were ejected from a
metal with a speed of 5.00 × 105 m-s¹ when irradiated
by light having a wavelength of 390.0 nm. Determine
the threshold frequency of this metal.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1: Defining threshold frequency

VIEW

Step 2: Calculating threshold frequency of the metal

VIEW

Solution

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Introduction and Principles of Quantum Theory

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.

Similar questions

The L lines for Ca, Zn, Zr, and Sn have wavelengths of 36.3, 11.9,6.07, and 3.60 Å, respectively. Estimate the wavelengths for the L lines for the elements listed in Problem 12-3.
In a FranckHertz experiment on sodium atoms, the first excitation threshold occurs at 2.103 eV. Calculate the wavelength of emitted light expected just above this threshold. (Note: Sodium vapor lamps used in street lighting emit spectral lines with wavelengths 5891.8 and 5889.9 Å.)
The figure below represents part of the emission spectrum for a one-electron ion in lhe gas phase. All the lines result from electronic transitions from excited states to the n = 3 state. (See Exercise 160.) a. What electronic transitions correspond to lines A and B? b. If the wavelength of line B is 142.5 nm, calculate the wavelength of line A.
Estimate the probability of finding an electron which is excited into the 2s orbital of the H atom, looking in a cubical box of volume 0.751036m3 centered at the nucleus. Then estimate the probability of finding the electron if you move the volume searched to a distance of 105.8 pm from the nucleus in the positive z direction. (Note that since these volumes are small, it does not matter whether the volume searched is cubical or spherical.)
A photoemissive material has a threshold energy, Emin = 5 1019 J. Will 300. nm radiation eject electrons from the material? Explain.
(a) Calculate the frequency and the wavelength of the line for the n = 6 to n = 4 transition. (b) Is this wavelength longer or shorter than that of the n = 7 to n = 4 transition?
Imagine a world in which the rule for the l quantum number is that values start with 1 and go up to n. The rules for the n and mi quantum numbers are unchanged from those of our world. Write the quantum numbers for the first two shells (i.e., n = 1 and n = 2).
The colors of the visible spectrum and the wavelengths corresponding to the colors are given in Figure 5.2. (a) Which colors of light involve photons with less energy per photon than yellow light? (b) Which color of visible light has photons of greater energy, green or violet? (c) Which color of light has the greater frequency, blue or green?
Potassium atoms in a flame emit light as they undergo transitions from one energy level to another that is 4.91019J lower in energy. Calculate the wavelength of light emitted and, by referring to Figure 4.3, predict the color visible in the flame.
In a FranckHertz experiment on hydrogen atoms, the first two excitation thresholds occur at 10.1 and 11.9 eV. Three optical emission lines are associated with these levels. Sketch an energy-level diagram for hydrogen atoms based on this information. Identify the three transitions associated with these emission lines. Calculate the wavelength of each emitted line.
The Doppler effect is one of the sources of the line broadening in atomic absorption spectroscopy. Atoms moving toward the light source encounter higher-frequency radiation than atoms moving away from the source. The difference in wavelength experienced by an atom moving at speed v (compared to one atrest) is / = v/c , where c is the velocity of light. Estimate the line width (in nanometers) of the lithiumline at 670.776(6707.76 Å) when the absorbing atoms are at a temperature of (a) 2000 K and (b) 3120 K.The average speed of an atom is given by v=8kT/m , where k is Boltzmann’s constant, Tis the absolute temperature, and m is its mass.
6.8 Calculate the wavelength in meters, of radiation of the following frequencies. (a) 5.001015s1 (b) 2.111014s1 (c) 5.441012s1