In a glass bulb filled with gaseous neon two metal plates are used as electrodes separated by a distance d the linear dimensions of the plates. Ionization energy for neon atom is Eo = 21.5 eV, average distance travelled by an electron between two consecutive collisions with neon atoms is I 0.4 mm and charge on an electron is e =-1.6 x 10-19 C. How much potential difference between the electrodes should be applied to initiate a discharge process? Ps 4 mm that is much smaller than %3D Egc

In a glass bulb filled with gaseous neon two metal plates are used as electrodes separated by a distance d the linear dimensions of the plates. Ionization energy for neon atom is Eo = 21.5 eV, average distance travelled by an electron between two consecutive collisions with neon atoms is I 0.4 mm and charge on an electron is e =-1.6 x 10-19 C. How much potential difference between the electrodes should be applied to initiate a discharge process? Ps 4 mm that is much smaller than %3D Egc

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter2: Atomic Structure And Periodicity

Section: Chapter Questions

Problem 161CP: The figure below represents part of the emission spectrum for a one-electron ion in lhe gas phase....

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Light with a wavelength of 405 nm fell on a strontium surface, and electrons were ejected. If the speed of an ejected electron is 3.36 105 m/s, what energy was expended in removing the electron from the metal? Express the answer in joules (per electron) and in kilojoules per mole (of electrons).
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.
When an electron is accelerated by a voltage difference, the kinetic energy acquired by the electron equals the voltage times the charge on the electron. Thus, one volt imparts a kinetic energy of 1.602 1019 volt-coulombs, or 1.602 1019 J. What is the wavelength for electrons accelerated by 1.00 104 volts?
6.28 A neon atom cmi light at many wavelengths, two of which are at 616.4 and 638.3 nm. Both of these transitions are to the same final state. (a) What is the energy difference between the two states for each transition? (b) If a transition between the two higher energy states could be observed, what would be the frequency of the light?
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).
State which of the following sets of quantum numbers would be possible and which impossible for an electron in an atom. a n = 2, I = 0, mi = 0, ms=+12 b n = 1, I = 1, mi = 0, ms=+12 c n = 0, I = 0, mi = 0, ms=12 d n = 2, I = 1, mi = 1, ms=+12 e n = 2, I = 1, mi = 2, ms=+13
In the photoelectric effect, electrons are ejected from a metal surface when light strikes it. A certain minimum energy, Emin, is required to eject an electron. Any energy absorbed beyond that minimum gives kinetic energy to the electron. It is found that when light at a wavelength of 540 nm falls on a cesium surface, an electron is ejected with a kinetic energy of 2.601020J. When the wavelength is 400 nm, the kinetic energy is 1.541019J. (a) Calculate Emin for cesium in joules. (b) Calculate the longest wavelength, in nanometers, that will eject electrons from cesium.
The most prominent line in the emission spectrum of aluminum is at 396.15nm. What is the frequency of this line? What is the energy of one photon with this wavelength? Of 1.00 mol of these photons?
A hydrogen atom in the ground stale absorbs a photon whose wavelength is 95.0 nm. The resulting excited atom then emits a photon of 1282 nm. What are the regions of the electromagnetic spectrum for the radiations involved in these transitions? What is the principal quantum number of the final state resulting from the emission from the excited atom?
Light with a wavelength of 425 nm fell on a potassium surface, and electrons were ejected at a speed of 4.88 105 m/s. What energy was expended in removing an electron from the metal? Express the answer in joules (per electron) and in kilojoules per mole (of electrons).
6.17 The laser in most supermarket barcode scanners operates at a wavelength of 632.8 nm. What is the energy of a single photon emitted by such a laser? What is the energy of one mole of these photons?
Give the possible values of a. the principal quantum number, b. the angular momentum quantum number, c. the magnetic quantum number, and d. the spin quantum number.

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