Practice problems Chapter 6 - University of Massachusetts ...

1 Practice problems Chapter 6 Name_____MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the )Which one of the following is correct?A) = cB) = c C) = cD) = c E) + = c1)2)The photoelectric effect is )a relativistic effectB)the ejection of electrons by a metal when struck with light of sufficient energyC)the darkening of photographic film when exposed to an electric fieldD)the production of current by silicon solar cells when exposed to sunlightE)the total reflection of light by metals giving them their typical luster2)3)Low-frequency electromagnetic fields with potential biological effects have frequencies of_____ )100-10,000B)1-1000C)10-5-10-9D)10-3-10- 5E)400-7003)4)In the Bohr model of the atom, )electron paths are controlled by probabilityB)electrons travel in circular paths called orbitalsC)electrons can have any energyD)

2 Electron energies are quantizedE)both A and C4)5)According to the Heisenberg Uncertainty Principle, it is impossible to know precisely both theposition and the _____ of an )massB)shapeC)momentumD)velocityE)color5 )6)The de Broglie wavelength of a _____ will have the shortest wavelength when traveling at 30 )carB)planetC)hydrogen atomD)uranium atomE)marble6)17)The uncertainty principle states that )it is impossible to know the exact position and momentum of an electronB)there can only be one uncertain digit in a reported numberC)it is impossible to know anything with certaintyD)matter and energy are really the same thingE)it is impossible to know how many electrons there are in an atom7)8)All of the orbitals in a given electron shell have the same value of the _____ quantum )azimuthalB)psiC)principalD)magneticE)sp in8)9)All of the orbitals in a given subshell have the same value of the _____ quantum )azimuthalB)magneticC)principalD)A and BE)B and C9)10)Which one of the following is not a valid value for the magnetic quantum number of an electron ina 5d subshell?

3 A)2B)1C)0D)3E)-110)11)Which of the subshells below do not exist due to the constraints upon the azimuthal quantumnumber?A)2sB)2pC)2dD)all of the aboveE)none of the above11)12)Which of the subshells below do not exist due to the constraints upon the azimuthal quantumnumber?A)4fB)4pC)4dD)4sE)none of the above12)13)An electron cannot have the quantum numbers n = _____, l = _____, ml = )1, 1, 1B)2, 0, 0C)3, 2, 1D)2, 1, -1E)3, 1, -113)14)An electron cannot have the quantum numbers n = _____, l = _____, ml = )1, 0, 0B)3, 2, 1C)3, 2, 3D)6, 1, 0E)3, 2, -214)15)Which one of the following is an incorrect subshell notation?A)4fB)3dC)2pD)2dE)3s15)16)Which one of the following is an incorrect orbital notation?A)3pyB)4sC)4dxyD)3fE)2s16)17)Wh ich quantum number determines the energy of an electron in a hydrogen atom?

4 A)lB)nC)ED)mlE)n and l17)218)Which one of the quantum numbers does not result from the solution of the Schroedingerequation?A)azimuthalB)spinC) principalD)angular momentumE)magnetic18)19)Which quantum numbers must be the same for the orbitals that they designate to be degenerate ina one-electron system (such as hydrogen)?A)n, l, and mlB)n onlyC)l and mlD)ml onlyE)n and l only19)20)Which one of the following represents an acceptable set of quantum numbers for an electron in anatom? (arranged as n, l, ml, and ms)A)5, 4,- 5, 1/2B)3, 3, 3, -1/2C)2, 2, -1, -1/2D)3, 3, 3, 1/2E)1, 0, 0, 1/220)21)Which one of the following represents an acceptable possible set of quantum numbers (in the ordern, l, ml, ms) for an electron in an atom?A)2, 2, 0, 1/2B)2, 0, 1, -1/2C)2, 0, 2, +1/2D)2, 1, 0, 0E)2, 1, -1, 1/221)22)Which one of the following represents an impossible set of quantum numbers for an electron in anatom?

5 (arranged as n, l, ml, and ms)A)2, 1, -1, -1/2B)5, 4, -3, -1/2C)5, 4, - 3, 1/2D)1, 0, 0, 1/2E)3, 3, 3, 1/222)323)Which electron configuration represents a violation of the Pauli exclusion principle?A)B)C)D)E)23)24)Which electron configuration represents a violation of the Pauli exclusion principle?A)B)C)D)E)24)425)Which electron configuration represents a violation of the Pauli exclusion principle?A)B)C)D)E)25)26)In a px orbital, the subscript x denotes the _____ of the )spin of the electronsB)probability of the shellC)size of the orbitalD)energyE)axis along which the orbital is aligned26)27)The _____ orbital is degenerate with 5py in a many-electron )5d2B)4pyC)5pxD)5dxyE)5s27)28)Which set of three quantum numbers (n, l, ml) corresponds to a 3d orbital?

6 A)3, 3, 2B)3, 2, 2C)3, 2, 3D)2, 3, 3E)2, 1, 028)29)At maximum, an f-subshell can hold _____ electrons, a d-subshell can hold _____electrons, and a p-subshell can hold _____ )14, 8, 2B)2, 6, 10C)2, 8, 18D)14, 10, 6E)2, 12, 2129)30)Which one of the following orbitals can hold two electrons?A)3sB)2pxC)4dxyD)all of the aboveE)none of the above30)531)In which orbital does an electron in a phosphorus atom experience the greatest effective nuclearcharge?A)1sB)2sC)2pD)3sE)3p31)32) Which of the following is a valid set of four quantum numbers? (n, l, ml, ms)A)2, 1, +2, +1/2B)2, 1, 0, +1/2C)1, 1, 0, -1/2D)2, 2, 1, -1/2E)1, 0, 1, +1/232)33)Which of the following is not a valid set of four quantum numbers? (n, l, ml, ms)A)3, 1, -1, -1/2B)2, 0, 0, +1/2C)1, 1, 0, +1/2D)2, 1, 0, -1/2E)1, 0, 0, +1/233)34)Which quantum numbers must be the same for the orbitals that they designate to be degenerate ina many-electron system?

7 A)ms onlyB)n, l, and mlC)n and l onlyD)n onlyE)n, l, ml, and ms34)35)Which one of the following is the correct electron configuration for a ground-state nitrogen atom?A)B)C)D)E)None of the above is )636)Which electron configuration denotes an atom in its ground state?A)B)C)D)E)36)37)The ground-state electron configuration of the element _____ is [Kr] )CrB)TcC)MoD)MnE)Nb37)38)The ground-state electron configuration of _____ is [Ar] )MnB)VC)FeD)CrE)K38)39)The ground state electron configuration of Fe is )1s22s22p63s23p63d64s2B)1s22s22p63s23p64 s24d6C)1s22s23s23p10D)1s22s23s23p63d6E)1 s22s22p63s23p64s239)40)The ground state electron configuration of Ga is )1s22s23s23p63d104s24p1B)1s22s22p63s23p6 4s24d104p1C)1s22s22p63s23p63d104s24d1D)[ Ar]4s23d11E)1s22s22p63s23p63d104s24p140) 741)Which one of the following configurations depicts an excited oxygen atom?

8 A)1s22s22p23s2B)1s22s22p2C)[He]2s22p4D)1 s22s22p4E)1s22s22p141)42)Which one of the following configurations depicts an excited carbon atom?A)1s22s22p13s1B)1s22s22p1C)1s22s22p 3D)1s22s22p2E)1s22s23s142)43)Which electron configuration represents a violation of Hund's rule for an atom in its ground state?A)B)C)D)E)43)844)Which electron configuration represents a violation of Hund's rule for an atom in its ground state?A)B)C)D)E)44)945)Which electron configuration represents a violation of Hund's rule for an atom in its ground state?A)B)C)D)E)45)46)Which of the following elements has a ground-state electron configuration different from thepredicted one?A)CaB)CuC)XeD)ClE)Ti46)47)Which two elements have the same ground-state electron configuration?A)Cu and AgB)Fe and CuC)Cl and ArD)Pd and PtE)No two elements have the same ground-state electron )48)The valence shell of the element X contains 2 electrons in a 5s subshell.

9 Below that shell, element Xhas a partially filled 4d subshell. What type of element is X?A)alkali metalB)main group elementC)transition metalD)halogenE)chalcogen48)10 Answer KeyTestname: Practice problems Chapter 61)C2)B3)B4)D5)C6)B7)A8)C9)D10)D11)C12)E 13)A14)C15)D16)D17)B18)B19)B20)E21)E22)E 23)E24)A25)E26)E27)C28)B29)D30)D31)A32)B 33)C34)C35)A36)E37)C38)D39)A40)E41)A42)A 43)E44)E45)D46)B47)E48)C11