Problem set # 4
Multiple choice Questions…
1. The energy levels of the hydrogen atom (and all atoms) are ______________, meaning that only certain
discrete energy levels are allowed.
a. varied
b. quantized
c. ramp-like
d. continuous
e. two of these
2. Which color of visible light has the least amount of energy per photon?
a. violet
b. blue
c. green
d. yellow
e. red
3. The form of EMR that has less energy per photon than infrared rays but more energy per photon than
radio waves is
a. microwaves
b. ultraviolet
c. gamma rays
d. X-rays
e. none of these
4. The distance between two successive peaks or troughs in a wave is called
a. the frequency
b. the wavelength
c. the speed
d. the amplitude
e. none of these
5. The ______________ is a phenomenon that may be caused by the burning of fossil fuels, which
increases the CO c2ntent in the earth’s atmosphere.
a. acid rain
b. greenhouse effect
c. infrared radiation
d. ozone problem
e. none of these
6. ______________ is a form of oxygen that protects us from high-energy radiation emitted by the sun.
a. Ozone
b. Carbon dioxide
c. Ultraviolet light
d. Methane
e. None of these
7. Which of the following is a reasonable criticism of the Bohr model of the atom?
a. It makes no attempt to explain why the negative electron does not eventually fall into
the positive nucleus.
b. It does not adequately predict the line spectrum of hydrogen. c. It does not adequately predict the ionization energy of the valence electron(s) for
elements other than hydrogen.
d. It does not adequately predict the ionization energy of the first-energy-level electrons
for one-electron species for elements other than hydrogen.
e. It shows the electrons to exist outside the nucleus.
8. The probability map for an electron is called
a. an orbit
b. a photon
c. an orbital
d. an electron configuration
e. none of these
9. A given set of f orbitals consists of ______________ orbital(s).
a. 1
b. 3
c. 5
d. 7
e. 9
10. The maximum number of electrons allowed in each of the d orbitals is
a. 2
b. 4
c. 8
d. 18
e. 32
11. The maximum number of electrons allowed in the fourth energy level is
a. 2
b. 4
c. 8
d. 18
e. 32
12. Which of the following is an incorrect designation for an atomic orbital?
a. 1s
b. 4f
c. 3s
d. 2d
e. 2p
13. What is the maximum number of electrons that can be put into each of the following subshells?
a. 3p ______________
b. 6s ______________
c. 5d ______________
d. 7f ______________
14. The number of d orbitals in the second principal energy level is
a. 2
b. 6
c. 10
d. 14
e. none of these
15. Phosphorus has how many electrons in its outermost principal energy level?
a. 1
b. 2
c. 3
d. 5
e. 15 16. Which of the following is the highest energy orbital for a silicon atom?
a. 1s
b. 2s
c. 3s
d. 3p
e. 3d
17. How many electrons are in the third principal energy level (n = 3) of one atom of Fe?
a. 2
b. 8
c. 14
d. 18
e. none of these
18. Which element has the fewest number of electrons in its valence shell?
a. Cs
b. Mg
c. P
d. O
e. Br
19. Which one of the following atoms has a partly filled d sublevel?
a. Ca
b. Ni
c. Zn
d. As
e. Ar
20. When moving down a group (family) in the periodic table, the number of valence electrons
a. remains constant
b. increases by 2 then 8 then 18 then 32
c. doubles with each move
d. decreases regularly
e. changes in an unpredictable manner
21. Which statement is not true?
A. The values of l range from o to (n-1).
B. The number of possible values for l describes the number of subshells in a shell.
C. The first four subshells that correspond to l=0, 1,2, and 3 are s, p, d and f.
D. In the shell n=2, there is 1 subshell.
22. The magnetic quantum number does NOT”
A. describe the spin of the electron.
B. give the particular orbitals ina subshell.
C. Have values which range from -1 to +1
D. suggest that there are always odd numbers of orbitals ina subshell.
14
23. What is the wavelength of radiation that has a frequency of 6.912 10 /s?
─15
A. 1.447 10 nm
B. 4.34 10 nm 6
C. 2.304 10 nm
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