Unit 2 Exam Review CHM 111
Chapter 2
1. The energy of a photon of light is __________ proportional to its frequency and __________
proportional to its wavelength.
A. directly, directly
B. inversely, inversely
C. inversely, directly
D. directly, inversely
E. indirectly, not
2. What color of visible light has the longest wavelength?
A. blue
B. violet
C. red
D. yellow
E. green
3. What is the frequency of light (s-1 ) that has a wavelength of 1.23 X 10 -6 cm ?
A. 3.69
B. 2.44 X 10 16
C. 4.10 X 10 12
D. 1.04 X 10-13
4. The energy of a photon that has a wavelength of 13.2 nm is __________ J.
A. 9.55 X 10-25
B. 1.62 X 10-17
C. 1.99 X 10-25
D. 1.51 X 10-17
5. A mole of yellow photons of wavelength 527 nm has __________ kJ of energy.
A. 165
B. 227
C. 2.74 X 10-19
D. 4.56 X 10-46
E. 6.05 X 10-3
6. It takes 254 kJ/mol to eject electrons from a certain metal surface. What is the longest
wavelength of light (nm) that can be used to eject electrons from the surface of this metal via
the photoelectric effect __________ ?
A. 472 B. 233 C. 165 D. 725 E. 552

7. What is the de Broglie wavelength (m) of a 2.0 kg object moving at a speed of 50 m/s?
A. 6.6 X 10 -36
B. 1.5 X 10 35
C. 5.3 X 10 -33
D. 2.6 X 10 -35
E. 3.8 X 10 34
8. At maximum, an f-subshell can hold __________ electrons, a d-subshell can hold __________
electrons, and a p-subshell can hold __________ electrons.
A. 2, 8, 6
B. 14, 10, 6
C. 2, 8, 18
D. 2, 12, 21
E. 14, 6, 10
9. The __________ quantum number defines the shape of an orbital.
A. spin
B. magnetic
C. principal
D. azimuthal
E. psi
10. The principal quantum number for the outermost electrons in a Br atom in the ground state is
__________.
A. 1
B. 2
C. 3
D. 4
E. 0
11. Which one of the quantum numbers does not result from the solution of the Schroedinger
equation?
A. spin
B. magnetic
C. principal
D. azimuthal
E. angular momentum