1 Practice Questions - Chapter 7 Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which one of the following represents an impossible set of quantum numbers for an electron in an atom? (arranged as n, l, ml, and ms) 1) A) 3, 3, 3, 1/2 B) 1, 0, 0, 1/2 C) 5, 4, - 3, 1/2 D) 2, 1, -1, -1/2 E) 5, 4, -3, -1/2 2) Which one of the following is an incorrect subshell notation? A) 2d B) 3d C) 4f D) 3s E) 2p 2) 3) Which set of three quantum numbers (n, l, ml) corresponds to a 3d orbital? 3) A) 3, 2, 3 B) 3, 2, 2 C) 2, 3, 3 D) 3, 3, 2 E) 2, 1, 0 4) The condensed electron configuration of krypton, element 36, is. A) [Kr]4s23d8 B) [Ar]4s43d4 C) [Kr]4s43d8 D) [Ar]4s4 E) [Ar]3d104s24p6 4) 5) Which one of the following configurations depicts an excited oxygen atom? A) 1s22s22p23s2 B) 1s22s22p1 C) 1s22s22p2 D) [He]2s22p4 E) 1s22s22p4 5) 6) In a px orbital, the subscript x denotes the of the electron. 6) A) size of the orbital B) energy C) probability of the shell D) spin of the electrons E) axis along which the orbital is aligned 1
2 7) The complete electron configuration of argon, element 18, is. A) 1s62s62p23s4 B) 1s22s22p63s23p6 C) 1s42s42p63s4 D) 1s22s22p103s23p2 E) 1s42s42p10 7) 8) Which one of the following represents an acceptable possible set of quantum numbers (in the order n, l, ml, ms) for an electron in an atom? 8) A) 2, 1, 0, 0 B) 2, 2, 0, 1/2 C) 2, 0, 1, -1/2 D) 2, 0, 2, +1/2 E) 2, 1, -1, 1/2 9) The ground-state electron configuration of is [Ar]4s13d5. A) V B) K C) Mn D) Cr E) Fe 9) 10) Which one of the quantum numbers does not result from the solution of the Schroedinger equation? 10) A) magnetic B) spin C) angular momentum D) azimuthal E) principal 11) The condensed electron configuration of silicon, element 14, is. A) [Ne]2p10 B) [He]2s62p2 C) [He]2s4 D) [He]2s42p6 E) [Ne]3s23p2 11) 2
3 12) Which quantum numbers must be the same for the orbitals that they designate to be degenerate in a one-electron system (such as hydrogen)? 12) A) ml only B) l and ml C) n and l only D) n, l, and ml E) n only 13) The complete electron configuration of gallium, element 31, is. A) 1s42s42p63s43p64s43d3 B) 1s22s22p103s23p104s23d3 C) 1s22s22p63s23p63d104s24p1 D) 1s42s42p83s43p84s3 E) 1s42s42p103s43p9 13) 14) An electron cannot have the quantum numbers n =, l =, ml =. 14) A) 3, 2, 3 B) 1, 0, 0 C) 6, 1, 0 D) 3, 2, 1 E) 3, 2, -2 15) The uncertainty principle states that. A) it is impossible to know the exact position and momentum of an electron B) it is impossible to know anything with certainty C) it is impossible to know how many electrons there are in an atom D) there can only be one uncertain digit in a reported number E) matter and energy are really the same thing 15) 16) Which of the following is a valid set of four quantum numbers? (n, l, ml, ms) 16) A) 2, 1, +2, +1/2 B) 1, 1, 0, -1/2 C) 2, 2, 1, -1/2 D) 1, 0, 1, +1/2 E) 2, 1, 0, +1/2 17) Which one of the following configurations depicts an excited carbon atom? A) 1s22s22p3 B) 1s22s22p1 C) 1s22s22p13s1 D) 1s22s23s1 E) 1s22s22p2 17) 3
4 18) Which one of the following represents an acceptable set of quantum numbers for an electron in an atom? (arranged as n, l, ml, and ms) 18) A) 3, 3, 3, -1/2 B) 1, 0, 0, 1/2 C) 3, 3, 3, 1/2 D) 5, 4,- 5, 1/2 E) 2, 2, -1, -1/2 19) The ground state electron configuration of Ga is. A) 1s22s22p63s23p63d104s24p1 B) [Ar]4s23d11 C) 1s22s22p63s23p64s24d104p1 D) 1s22s23s23p63d104s24p1 E) 1s22s22p63s23p63d104s24d1 19) 20) How many different principal quantum numbers can be found in the ground state electron configuration of nickel? 20) A) 2 B) 3 C) 4 D) 5 E) 6 21) Which one of the following is not a valid value for the magnetic quantum number of an electron in a 5d subshell? 21) A) 3 B) 0 C) -1 D) 1 E) 2 22) The orbital is degenerate with 5py in a many-electron atom. A) 4py B) 5dxy C) 5px D) 5s E) 5d2 22) 23) According to the Heisenberg Uncertainty Principle, it is impossible to know precisely both the position and the of an electron. 23) A) color B) velocity C) mass D) momentum E) shape 24) In which orbital does an electron in a phosphorus atom experience the greatest effective nuclear charge? 24) A) 1s B) 2s C) 2p D) 3s E) 3p 25) Which quantum number determines the energy of an electron in a hydrogen atom? A) n B) l C) ml D) E E) n and l 25) 4
5 26) An electron cannot have the quantum numbers n =, l =, ml =. 26) A) 2, 0, 0 B) 1, 1, 1 C) 2, 1, -1 D) 3, 2, 1 E) 3, 1, -1 27) Which of the following is not a valid set of four quantum numbers? (n, l, ml, ms) 27) A) 1, 1, 0, +1/2 B) 2, 1, 0, -1/2 C) 1, 0, 0, +1/2 D) 2, 0, 0, +1/2 E) 3, 1, -1, -1/2 28) All of the orbitals in a given subshell have the same value of the quantum number. A) azimuthal B) principal C) magnetic D) A and B E) B and C 28) 29) The ground-state electron configuration of the element is [Kr]5s14d5. A) Nb B) Tc C) Cr D) Mn E) Mo 29) 30) The ground state electron configuration of Fe is. A) 1s22s22p63s23p63d64s2 B) 1s22s22p63s23p64s2 C) 1s22s22p63s23p64s24d6 D) 1s22s23s23p63d6 E) 1s22s23s23p10 30) 31) Which one of the following is an incorrect orbital notation? A) 4s B) 3f C) 3py D) 4dxy E) 2s 31) 32) All of the orbitals in a given electron shell have the same value of the quantum number. A) spin B) psi C) principal D) magnetic E) azimuthal 33) The element that corresponds to the electron configuration 1s22s22p6 is. A) lithium B) beryllium C) neon D) magnesium E) sodium 32) 33) 5
6 34) The wavelength of an electron with a velocity of m/s is m. The mass of the electron is g. A) B) C) D) E) ) 35) Which quantum numbers must be the same for the orbitals that they designate to be degenerate in a many-electron system? 35) A) n, l, and ml B) n and l only C) ms only D) n only E) n, l, ml, and ms 36) Which of the subshells below do not exist due to the constraints upon the azimuthal quantum number? 36) A) 4d B) 4s C) 4f D) 4p E) none of the above 37) Which of the following elements has a ground-state electron configuration different from the predicted one? 37) A) Cl B) Cu C) Ti D) Ca E) Xe 38) All of the have a valence shell electron configuration ns1. A) chalcogens B) noble gases C) alkaline earth metals D) halogens E) alkali metals 38) 6
7 39) What is the correct ground-state electron configuration for molybdenum? A) [Kr]5s24d5 B) [Kr]5s14d10 C) [Kr]5s24d9 D) [Kr]5s24d4 E) [Kr]5s14d5 39) 40) Which group in the periodic table contains elements with the valence electron configuration of ns2 np1? A) 1A B) 2A C) 3A D) 4A E) 8A 40) 41) How many p-orbitals are occupied in a Ne atom? A) 3 B) 6 C) 2 D) 5 E) 1 41) 42) The ground state electron configuration for Zn is. A) [Ar]4s13d10 B) [Kr]3s23d10 C) [Ar]4s23d10 D) [Kr]4s23d10 E) [Ar]3s23d10 42) 43) In a ground-state manganese atoms, the subshell is partially filled. A) 4s B) 3d C) 4d D) 3s E) 4p 43) 44) [Ar]4s23d104p3 is the electron configuration of a(n) atom. A) V B) As C) P D) Sb E) Sn 44) 45) The electron configuration of a ground-state Ag atom is. A) [Kr]5s24d10 B) [Ar]4s24d9 C) [Kr]5s23d9 D) [Ar]4s14d10 E) [Kr]5s14d10 45) 46) There are unpaired electrons in a ground state fluorine atom. A) 0 B) 1 C) 2 D) 3 E) 4 46) 47) The largest principal quantum number in the ground state electron configuration of cobalt is. 47) A) 2 B) 3 C) 4 D) 7 E) 9 7
8 48) The quantum number defines the shape of an orbital. A) azimuthal B) magnetic C) spin D) principal E) psi 48) 49) The largest principal quantum number in the ground state electron configuration of iodine is. 49) A) 1 B) 4 C) 5 D) 6 E) 7 50) Elements in group have a np6 electron configuration in the outer shell. A) 5A B) 6A C) 4A D) 8A E) 7A 50) 51) At what speed (m/s) must a 3.0 mg object be moving in order to have a de Broglie wavelength of m? A) B) 6.3 C) D) 4.1 E) ) 52) There are unpaired electrons in a ground state phosphorus atom. A) 0 B) 1 C) 2 D) 3 E) 4 52) 53) The debroglie wavelength of a particle is given by. A) h + mv B) hmv C) mv D) h/mv E) mv/c 53) 54) In which orbital does an electron in a phosphorus atom experience the greatest shielding? 54) A) 3p B) 1s C) 2s D) 3s E) 2p 55) Each p-subshell can accommodate a maximum of electrons. A) 2 B) 3 C) 10 D) 6 E) 5 55) 56) The de Broglie wavelength of an electron is m. The mass of an electron is kg. The velocity of this electron is m/s. A) B) C) D) E) ) 57) The 3p subshell in the ground state of atomic xenon contains electrons. A) 2 B) 6 C) 8 D) 10 E) 36 57) 58) There are orbitals in the second shell. A) 1 B) 2 C) 4 D) 8 E) 9 58) 8
9 59) The principal quantum number for the outermost electrons in a Br atom in the ground state is. 59) A) 3 B) 1 C) 4 D) 2 E) 5 60) Which is the correct ground-state electron configuration for silver? A) [Kr]5s24d9 B) [Kr]5s14d10 C) [Xe]5s14d10 D) [Xe]5s24d9 E) [Kr]5s24d10 60) 61) The total number of orbitals in a shell is given by. A) n2 B) I2 C) 2n D) 2l + 1 E) 2n ) 62) How many p-orbitals are occupied in a Ne atom? A) 1 B) 6 C) 2 D) 0 E) 3 62) 63) A tin atom has 50 electrons. Electrons in the subshell experience the lowest effective nuclear charge. 63) A) 3p B) 3d C) 5s D) 1s E) 5p 64) The 4d subshell in the ground state of atomic xenon contains electrons. A) 2 B) 6 C) 8 D) 10 E) 36 64) 65) What color of visible light has the highest energy? A) yellow B) blue C) green D) violet E) red 65) 66) The subshell contains only one orbital. A) 5d B) 4s C) 6f D) 1p E) 3d 66) 67) How many quantum numbers are necessary to designate a particular electron in an atom? 67) A) 5 B) 3 C) 2 D) 1 E) 4 68) A orbital is degenerate with a 5dz 2 in a many-electron atom. 68) A) 5dxy B) 4dzz C) 4dz 2 D) 5s E) 5pz 69) The largest principal quantum number in the ground state electron configuration of barium is. 69) A) 1 B) 2 C) 4 D) 5 E) 6 9
10 70) The n = 1 shell contains p orbitals. All the other shells contain p orbitals. A) 0, 3 B) 0, 6 C) 3, 6 D) 3, 3 E) 6, 2 70) 71) There are orbitals in the third shell. A) 1 B) 25 C) 4 D) 9 E) 16 71) 72) What is the de Broglie wavelength (m) of a 25 g object moving at a speed of 5.0 m/s? A) B) C) D) E) ) 73) The principal quantum number of the first d subshell is. A) 1 B) 2 C) 3 D) 4 E) 0 73) TRUE/FALSE. Write ʹTʹ if the statement is true and ʹFʹ if the statement is false. 74) Black body radiation is the emission of light from metal surfaces. 74) 75) The square of Schrodingerʹs wave equation is called an orbital. 75) 76) The wavelength of radio waves can be longer than a football field. 76) 77) The electron density of the 2s orbital is asymmetric. 77) 78) If a hydrogen atom electron jumps from the n=6 orbit to the n=2 orbit, energy is released. 78) 10
11 Answer Key Testname: CHAPTER 7 PRACTICE 1) A 2) A 3) B 4) E 5) A 6) E 7) B 8) E 9) D 10) B 11) E 12) E 13) C 14) A 15) A 16) E 17) C 18) B 19) A 20) C 21) A 22) C 23) D 24) A 25) A 26) B 27) A 28) D 29) E 30) A 31) B 32) C 33) C 34) B 35) B 36) E 37) B 38) E 39) E 40) C 41) C 42) C 43) B 44) B 45) E 46) B 47) C 48) A 49) C 50) D 11
12 Answer Key Testname: CHAPTER 7 PRACTICE 51) D 52) D 53) D 54) A 55) D 56) B 57) B 58) C 59) C 60) B 61) A 62) E 63) E 64) D 65) D 66) B 67) E 68) A 69) E 70) A 71) D 72) A 73) C 74) FALSE 75) TRUE 76) TRUE 77) FALSE 78) TRUE 12
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