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Name: ________________________ Class: ___________________ Date: __________
ID: A
Homework 5
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
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1. A quantum of electromagnetic radiation is a
a. wave function.
b. photon.
c. de Broglie wave.
d. laser.
e. hologram.
2. The energy associated with a photon of blue light is _____ the energy associated with a photon of red light.
a. greater than
b. less than
c. equal to
d. unrelated to
3. An excited atom can lose energy by
a. emitting a photon.
b. absorbing a photon.
c. undergoing the photoelectric effect.
d. increasing its de Broglie wavelength.
e. the uncertainty principle.
4. In which of the following energy level transitions for a hydrogen atom is a photon emitted?
(A) n =1 to n = 2.
(B) n =3 to n = 2.
(C) n =2 to n = 1.
(D) n =1 to n = 4.
(E) n =4 to n = 3.
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a. A and B
b. A, C, and E
c. B and D
d. B, C, and E
e. D and E
5. The fact that a particle cannot be precisely localized is the
a. photoelectric effect.
b. uncertainty principle.
c. principle of a hologram.
d. principle of a laser.
e. reason why photons are emitted.
6. What is "excluded" by the Pauli exclusion principle?
a. certain values of angular momentum.
b. precise values of both position and momentum.
c. electrons in the same quantum state.
d. none of the above.
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Name: ________________________
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ID: A
7. The lowest energy level in an atom is its
a. ionization level.
b. emission level.
c. absorption level.
d. photon level.
e. ground state.
8. Electron diffraction shows
a. that electrons behave like waves.
b. the photoelectric effect.
c. characteristic x ray spectra.
d. that electrons in atoms have only certain allowed energies.
9. What quantities are plotted on a blackbody radiation curve?
a. total radiated energy vs. temperature.
b. radiation intensity vs. wavelength.
c. wavelength of peak emission vs. temperature.
d. none of the above.
Exhibit 10-01
Answer the questions using the energy level diagram for hydrogen shown in the figure below.
____ 10. Refer to Exhibit 10-01. The energy of a photon emitted in a transition from the n = 3 state to the n = 2 state is
a. 1.5 eV.
b. 1.9 eV.
c. 3.4 eV.
d. 10.2 eV.
e. 13.6 eV.
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Name: ________________________
ID: A
____ 11. When radium-223 (Z = 88) decays to radon-119 (Z = 86), the other particle emitted is a(n)
a. alpha particle.
b. beta particle.
c. gamma ray.
d. x ray.
e. none of the above.
____ 12. The half life of uranium-232 is 70 years. The time for 3/4 of a sample of uranium-232 to decay is
a. 35 years.
b. 70 years.
c. 125 years.
d. 140 years.
e. none of the above.
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ID: A
Homework 5
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
B
A
A
D
B
C
E
A
B
B
A
D
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