Ch678Review - MULTIPLE CHOICE. Choose the ONE alternative...

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Unformatted text preview: MULTIPLE CHOICE. Choose the ONE alternative that best completes the statement or answers the question and place your answer in the blank. (2 pt each) 1) Which orbitals do not have a node at the nucleus? 1) A) s B) all beyond the first shell C) none D) all but 5 2) Which of the following radioactive nuclides would be expected to most readily substitute for 2) calcium in bone? A) potassium-40 B) strontium—90 C) cesium—133 D) iodine—131 3) Which of the following represent electron configurations that violate the Pauli exclusion 3) principle? (A) [Ne]3513p5 (B) [Kr14d125525p3 (C) [Ar]3d104524p2 A) only (A) B) only (B) C) (A) and (B) D) (B) and (C) 4) The wave characteristics of a large, moving object, such as an automobile, are difficult to 4) observe because the A) wavelength is very small. B) energy is quantized, but the spacing between energy levels is small. C) energy is not quantized. D) wavelength is very large. 5) lNhat are the possible values of I if n = 5? 5) A) —5, -4, ~3, -2, -—I, 0, +1, +2, +3, +4, or +5 B) 0, I, 2, 3, or 4 C) 5 D) 41, —3, -2, —1, 0, +1, +2, +3, or +4 6) How many unpaired electrons are in an atom of Co in its ground state? 6) A) 1 B) 7 C) 2 D) 3 7) What is the ground-state valence—shell electron configuration of the group of elements 7) indicated by the shaded portion of the periodic table? A) n52(n-1)d2 B) 115204—13)2 C) rzsznpz D) n52 A-l 8) Which orbital—filling diagram violates Hund's rule? A) [Ar] 11 T_ L T_ T_ _ 4s 30’ B) [All E L L L L __ 4s 3d C) [At] _ T— L L T__ T— 49 3d D) [Ar] Li 1. T_ T _. _ 4S 3d 9) Which ion has the smallest ionic radius? A) Br“ B) F— C) I— D) Cl— 10) The symbol [Kr] represents A) 1522522 63523 63d104524 64d10. B 1522522 63523 64524 6. P P p P P p C) 1522522p63523p63d104524p6. D) 4s24p6. 11) How many electrons can a single orbital hold? A)8 B)21+1 C)2 D)2n 12) Arrange the ions N31 02—, Mg2+, Na+, and F- in order of increasing ionic radius, starting with the smallest first. A) N3: 02-, F-, Na+, Mg2+ C) N3—, Mg2+, 02—, Na+, F- B) N3-, 02—, Mg2+, F-, Na+ D) Mg2+, Na+, F-, 02—, N3- 13) For an electron in a given atom, the larger 11, the A) larger the average distance from the nucleus and the higher the orbital energy. B) smaller the average distance from the nucleus and the higher the orbital energy. C) larger the average distance from the nucleus and the lower the orbital energy. D) smaller the average distance from the nucleus and the lower the orbital energy. 14) How many orbitals are there in the seventh shell? A) 49 B) 21 C) 7 D) 6 15) Which of the following have their valence electrons in the same shell? A) B, Si, As B) He, Ne, F C) N, As, Bi D) K, As, Br 16) Which has the highest Zeff for its valence electrons? A) Cl B) Na C) Si D) K 9) 10) 11) 12) 13) 14) 17) According to the Balmer—Rydberg equation, electromagnetic radiation with the shortest wavelength will be emitted when an electron undergoes which of the following transitions? A)n=2—>n:3 B)n=3—+n=2 C)n=1—+n=2 D)n=2—>n=1 18) Which ionization process requires the most energy? A) P3+(g) —> P4+(g) + e- B) P+(g) —> P2+(g) + e- C) P(g) —> P+(g) + e- D) P2+(g) —> P3+(g) + e- 19) Which of the following elements would you predict to have an anomalous electron configuration? A) Se B) Ag C) Sr D) Ce 20) 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 = 6.626 x 10-34] - s A) 46.3 kJ/mol B) 949 kJ/mol C) 0.0463 kJ/mol D) 7.69 x 10-23 kJ/mol 21) For the fourth-shell orbital shown below, what are the principal quantum number, n, and the angular momentum quantum number, I? A)n=4andl=3 B)n:4andl=1 C)n=4andl=2 D)n:4andl:0 22) List the elements Na, Ca, Rb, Cl, He in order of decreasing first ionization energy. A)Rb>Ca>Cl>Na>He B)He>Na>Ca>Cl>Rb C)He>Na>Cl>Ca>Rb D)He>Cl>Ca>Na>Rb A—3 17) 18) 19) 20) 21) 22) 23) Which grouping of elements, indicated by letter on the periodic table above, represents the p—block elements? A) A B) B C) C D) D 24) A neutral sulfur atom has how many valance electrons? A) 4 B) 6 C) 2 D) 16 25) Mendeleev arranged the elements according to A) physical state and relative abundance. B) atomic number and atomic weight. C) electron configuration and atomic weight. D) atomic weight and chemical reactivity. 26) What is the ground-state electron configuration of Co? A) [Ar]4524p64d1 B) [Ar]4523d7 C) [Ar]4513d8 D) [Ar]3d9 27) Which of the following is not a valid set of quantum numbers? A)n=3,l=0,ml=0,andms=1/2 B) n23,l=2,m1=3,andm5=1/2 C) n22,l= 1,m1=-1, andmsz-l/Z D) n:2,l=1,m[:0, and msz-l/Z 28) Of the following, which atom has the largest atomic radius? A) Cl B) K C) Na D) Br 23) 26) 27) 28) 29) Which element, indicated by letter on the periodic table above, contains three f electrons? A) A B) B C) C D) D 30) Which ion has the same electron configuration as Kr? A) Br— B) Rb+ C) Sez‘ D) All of the above 31) The element In has how many valence electrons? A) 13 B) 3 C) 1 D) 2 32) 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 1014 5-1 C) 4.74 x 105 s—1 B) 1.58 x10‘15 5—1 D) 2.11 x 10—15 s—1 33) The greater the energy of a photon, the A) shorter the wavelength and the lower the frequency. B) longer the wavelength and the higher the frequency. C) longer the wavelength and the lower the frequency. D) shorter the wavelength and the higher the frequency. 34) 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) Vibrational transitions require the least energy and electronic transitions the most. B) Vibrational transitions require the least energy and rotational transitions the most. C) Electronic transitions require the least energy and vibrational transitions the most. D) Rotational transitions require the least energy and electronic transitions the most. 29) 33) 34) Two electromagnetic waves are represented below. (a) (b) 35) Wave (a) has the 35) A) shorter wavelength and higher energy than wave (b). B) longer wavelength and higher energy than wave (b). C) longer wavelength and lower energy than wave (b). D) shorter wavelength and lower energy than wave (b). 36) Wave (b) has the 36) A) lower amplitude and weaker intensity than wave (a). B) higher amplitude and weaker intensity than wave (a). C) lower amplitude and greater intensity than wave (a). D) higher amplitude and greater intensity than wave (a). 37) What are the possible values of n and ml for an electron in a 5d orbital? 37) A) n=1,2,3,4,or5andml=2 B) n=5andml=2 C) n = 5 and ml = —Z, —1, 0, +1, or +2 D) n = 1, 2, 3, 4, or 5 and m1 = —2, —1, 0, +1, or +2 38) Of the following, which has the shortest de Broglie wavelength? 38) A) an airplane moving at a velocity of 300 mph B) a helium nucleus moving at a velocity of 1000 mph C) a nitrogen molecule moving at a velocity of 1000 mph D) a nitrogen molecule moving at a velocity of 5000 mph 39) Which element has the ground—state electron configuration [Xe]6525d14f7? 39) A) Eu B) Pt C) Tb D) Cd 40) What is a quantum of light called? 40) A) the wavelength B) a photon C) the amplitude D) the frequency A—6 41) What is the general trend in ionization energy and electron affinity values? 41) A) Both increase as one traverses a period from left to right and both increase as one descends a group. B) Both increase as one traverses a period from left to right and both decrease as one descends a group. C) Both decrease as one traverses a period from left to right and both increase as one descends a group. D) Both decrease as one traverses a period from left to right and both decrease as one descends a group. 42) Of the following, which atom has the smallest atomic radius? 42) A) Sr B) Mg C) Te D) S 43) For a multielectron atom, a 35 orbital lies lower in energy than a 3;: orbital because 43) A) there are more p orbitals than 5 orbitals in a given shell. B) a 3;: orbital has more nodal surfaces than a 35 orbital. C) other electrons more effectively shield electrons in the 3p orbital from the nucleus. D) other electrons more effectively shield electrons in the 3s orbital from the nucleus. The spheres below represent atoms of Sb, As, P, and N (not necessarily in that order). 0 O CO ‘ = 75 pm r = l 10 pm r = 120 pm r = 140 pm (a) (b) (C) (d) 44) Which one of these spheres represents an atom of P? 44) A) sphere (a) B) sphere (b) C) sphere (c) D) sphere (d) 45) Which of the following have the same number of valence electrons? 45) A) B, Si, As B) N, As, Bi C) K, As, Br D) He, Ne, F \ \K :“ >0 46) According to the Balmer-Rydberg equation, electromagnetic radiation with wavelength /\ = 46) (5 486.1 nm will be absorbed when an electron undergoes which of the following transitions? A)n=2—>n=3 B)n:2—+n=4 C)n=4->n=2 D)n:3——>n=2 47) Which liberates the most energy? 47) A) K(g) + e‘ a K13) B) Li(g) + e- a Li-(g) C) Na(g) + e- —> Na-(g) D) Rb(g) + e' -—> Rb“(g) A-7 48) According to the Heisenberg uncertainty principle, A) the position of a particle cannot be measured precisely. B) the position and momentum of a particle can be measured precisely, but not at the same time. C) the momentum of a particle cannot be measured precisely. D) neither the position nor the momentum of a particle can be measured precisely. 49) The number of orbitals in a given subshell, such as the 5d subshell, is determined by the number of possible values of A) l. B) m]. C) n. D) mg. 50) Which element has the most favorable (most negative) electron affinity? A) Mg B) O C) Na D) Ne A -8 48) 49) U1 3 V 1) 2) 3) 4) 5) 6) 7) 8) 9) l0) 1]) )2) I3) 14) 15) l6) l7) I8) 19) 20) 2i) 22) 23) 24) 25) 26) 27) 28) 29) 30) 31) 32) 33) 34) 35) 36) 37) 38) 39) 40) 41) 42) 43) 44) 45) 46) 47) 48) 49) 50) >U>>CGOWUOUW>WCU> >3 B wwwwnuwwo>n>>co> —.-.>-.~ WW: Solution: Chapter 6 & 7 ...
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This document was uploaded on 10/30/2011 for the course CHEM 1307 at Texas Tech.

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Ch678Review - MULTIPLE CHOICE. Choose the ONE alternative...

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