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Unformatted text preview: Homework Atomic structure Chapter 7 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Molecular vibrational energy transitions are observed in the infrared, molecular rotational
transitions in the microwave, and electronic transitions in the ultraviolet-visible range. Which
transitions require the most energy and which the least energy? A) Electronic transitions require the least energy and vibrational transitions the most. B) Vibrational transitions require the least energy and electronic transitions the most. C) Vibrational transitions require the least energy and rotational transitions the most. D) Rotational transitions require the least energy and electronic transitions the most. 2) What is the frequency of a helium-neon laser light with a wavelength of 632.8 nm‘? The speed of light is 3.00 x 108 m/s.
A) 4.74 x 105 s~1
C) 4.74 x 1014 s-1 3) What is a quantum of light called? A) the frequency B) the wavelength 4) The intensity of a beam of light is related to its
A) frequency. C) relative number of photons. B) 2.11 x 10—15 5-1
D) 1.58x 10-15 5-1 C) the amplitude D) a photon B) speed. D) wavelength. 5) The absorption of light of frequency 1.16 x 1011 Hz is required for CO molecules to go from the
lowest rotational energy level to the next highest rotational energy level. Determine the energy for this transition in kJ/mol. h a 6.626 x 1034 J - s
A) 7.69 x 10—23 kJ/mol C) 949 kJ/mol B) 0.0463 kJ/mol
D) 46.3 kJ/mol 6) The absorption of a photon of wavelength 4.67 x 10-5 m is necessary for a CO molecule to pass from the lowest vibrational energy level to the next highest vibrational level. if this higher vibrational
level has an energy of 6.41 x 10-20 J, what is the energy of the lowest vibrational level? h = 6.626 X10-34J-s A) 1.60 X 10-20 J B) 4.26 X 10'20 J C) 3.20 x 10-20 J D) 2.15 x 10—20 J 7) What is the de Broglie wavelength of an electron (m = 9.11 x 10-31 kg) moving at a velocity of 3.0 x 107 We (10% of the speed of light)?
A) 2.4 x10-11m
C) greater than 1.1 x 10-4 m B) less than 3.9 x 10'12 m
D) 3.3 x 10-8 m 1) 2) 3) 4) 5) 6) 8) The greater the energy of a photon, the
A) shorter the wavelength and the higher the frequency. B) longer the wavelength and the lower the frequency.
C) longer the wavelength and the higher the frequency. D) shorter the wavelength and the lower the frequency. 9) The number of orbitals in a given subshetl, such as the 5d subshell, is determined by the number of
possible values of A) I. B) n. C) m]. D) ms.
10) What are the possible values of n and m) for an electron in a 5d orbital? A)n=1,2, 3,4, or5andml=2 B)n=5andm|=2 C) n = 1, 2, 3, 4, or 5 and mi = —2, —1, 0, +1, or +2 D) n = 5 and m] = -Z, -1, 0, +1, or+2
11) How many subshells are there in the shell with n = 6? A) 36 B) 5 C) 6 D) 15 12) What are the possible values of! if n = 5?
A)0, 1, 2, 3, CM
C) —‘5, -4, —S, -2, ~1, 0, +1, +2, +3, +4, or +5 B) -4, -3, -2, 4, 0, +1, +2, +3, or +4
D) 5 13) For a hydrogen atom, which electronic transition would result in the emission of a photon with the
highest energy? A) 2343p B)5f—+3d C) 3p—+6d D)4p~>Zs
14)Which of the following is not a valid set of quantum numbers?
A)n=3,l=0,m|=0, and ms: 1/2 B)n=2,l= 1,m|=~1, andms=-112 C)n=2,l=1,m|=0,andms=-1/2 D)n=3,l=2,m)=3,andms=1l2 8) 10) 11) 12) 13) 14) Two electromagnetic waves are represented below. (a) L (b) 15) Wave (a) has the
A) longer wavelength and higher energy than wave (b). B) shorter wavelength and higher energy and higher energy than wave (b).
C) longer wavelength and lower energy and higher energy than wave (b). D) shorter wavelength and lower energy and higher energy than wave (b). 16) Wave (3) has the
A) longer wavelength and higher frequency than wave (b).
B) longer wavelength and lower frequency than wave (b).
C) shorter wavelength and lower frequency than wave (b). D) shorter wavelength and higher frequency than wave (b). 17) Wave (b) has the
A) lower amplitude and greater intensity than wave (a). B) lower amplitude and weaker intensity than wave (a).
C) higher amplitude and greater intensity than wave (a). D) higher amplitude and weaker intensity than wave (a). 18) If wave (a) represents green light, wave (b) might represent
A) red light. B) blue light. C) ultraviolet radiation. D) X—rays. 15) 16) 17) 18) ...
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- Spring '08