PHYS 1010 Exam 3 with verified detailed answers ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
The spectral lines for elements are called atomic fingerprints because they: - correct
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answer✔✔are unique for each element ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
In the Rutherford model of the atom, nearly all of the volume occupied by the atom
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consists of: - correct answer✔✔a vacuum ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
What force is responsible for holding the electrons in their orbits around the nucleus? -
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correct answer✔✔electric ||\\|//||
As the temperature of an incandescent radiating object increases, the frequency with the
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maximum brightness: - correct answer✔✔increases ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
Planck was able to obtain the correct curve for the spectrum of light emitted by a hot
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object by assuming that the: - correct answer✔✔vibrational energies of the atomic
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resonators were quantized ||\\|//|| ||\\|//||
What is the energy of a photon associated with light having a 500nm wavelength? - correct
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answer✔✔2.48 eV ||\\|//||
Einstein was able to account for the experimental observations of the photoelectric effect ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
by assuming that: - correct answer✔✔light consists of photons
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Light quanta (photons) with an energy of 5.0 eV are incident on a metal surface. The
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photoelectrons that are ejected from the surface have a kinetic energy of 3.0 eV. What is ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
the work function of the metal? - correct answer✔✔2.0 eV
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, Bohr gave the following reason for the electron in the hydrogen atom existing only in
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certain discrete energy levels - correct answer✔✔He gave no explanation, but simply
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postulated it ||\\|//||
When a light is emitted by an atom: - correct answer✔✔an electron drops to a lower
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energy level ||\\|//||
In making a transition from the n=1 quantum state to the n=2 quantum state, the
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hydrogen atom must: - correct answer✔✔absorb a photon ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
What is the magnitude of the energy difference between the n=2 quantum state and the
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n=1 quantum state of a hydrogen atom? - correct answer✔✔10.2 eV
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The abbreviation eV stands for electron Volt which is an atomic physics unit of: - correct
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answer✔✔energy
The work function of a metal is: - correct answer✔✔the work required to remove an
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electron from the surface ||\\|//|| ||\\|//|| ||\\|//||
The spikes in the X-Ray spectrum are due to: - correct answer✔✔photons emitted by
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electrons changing inner shell orbits ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
What difference in energy between two atomic levels of an atom is required to produce an
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X-ray photon with a frequency of 6.0x10^17 Hz? - correct answer✔✔2.48 KeV
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A mass vibrates up and down on a vertical spring. If the period of the motion is two
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second, the frequency is: - correct answer✔✔one-half cycle per second ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
The spectral lines for elements are called atomic fingerprints because they: - correct
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
answer✔✔are unique for each element ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
In the Rutherford model of the atom, nearly all of the volume occupied by the atom
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
consists of: - correct answer✔✔a vacuum ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
What force is responsible for holding the electrons in their orbits around the nucleus? -
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
correct answer✔✔electric ||\\|//||
As the temperature of an incandescent radiating object increases, the frequency with the
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
maximum brightness: - correct answer✔✔increases ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
Planck was able to obtain the correct curve for the spectrum of light emitted by a hot
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
object by assuming that the: - correct answer✔✔vibrational energies of the atomic
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
resonators were quantized ||\\|//|| ||\\|//||
What is the energy of a photon associated with light having a 500nm wavelength? - correct
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
answer✔✔2.48 eV ||\\|//||
Einstein was able to account for the experimental observations of the photoelectric effect ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
by assuming that: - correct answer✔✔light consists of photons
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
Light quanta (photons) with an energy of 5.0 eV are incident on a metal surface. The
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
photoelectrons that are ejected from the surface have a kinetic energy of 3.0 eV. What is ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
the work function of the metal? - correct answer✔✔2.0 eV
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
, Bohr gave the following reason for the electron in the hydrogen atom existing only in
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
certain discrete energy levels - correct answer✔✔He gave no explanation, but simply
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
postulated it ||\\|//||
When a light is emitted by an atom: - correct answer✔✔an electron drops to a lower
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
energy level ||\\|//||
In making a transition from the n=1 quantum state to the n=2 quantum state, the
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
hydrogen atom must: - correct answer✔✔absorb a photon ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
What is the magnitude of the energy difference between the n=2 quantum state and the
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
n=1 quantum state of a hydrogen atom? - correct answer✔✔10.2 eV
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
The abbreviation eV stands for electron Volt which is an atomic physics unit of: - correct
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
answer✔✔energy
The work function of a metal is: - correct answer✔✔the work required to remove an
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
electron from the surface ||\\|//|| ||\\|//|| ||\\|//||
The spikes in the X-Ray spectrum are due to: - correct answer✔✔photons emitted by
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
electrons changing inner shell orbits ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
What difference in energy between two atomic levels of an atom is required to produce an
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
X-ray photon with a frequency of 6.0x10^17 Hz? - correct answer✔✔2.48 KeV
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
A mass vibrates up and down on a vertical spring. If the period of the motion is two
||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
second, the frequency is: - correct answer✔✔one-half cycle per second ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||
