PHYS 1010 Exam 3 with correct |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
answers
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
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What force is responsible for holding the electrons in their orbits around the nucleus? - correct
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answer✔✔electric
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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 object by
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assuming that the: - correct answer✔✔vibrational energies of the atomic resonators were
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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
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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
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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 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
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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
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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
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answers
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
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