智慧树知到《原子物理》章节测试答案
智慧树知到《原子物理》章节测试答案
第一章单元测试
1、The energy scale of atom is（）.
A.TeV
B.GeV
C.eV
D.MeV
正确答案：eV
2、The density scale of atom is（）
A.1010 g/cm3
B.1 g/cm3
C.1015 g/cm3
D.102 g/cm3
正确答案：1 g/cm3
3、Who did propose that the matter was indivisible in ancient Greece？（）
A.Plato
B.Aristotle
C.Democracy
D.Archimedes
正确答案：Democracy
4、Who did firstly show the Periodic table？（）
A.Mendeleev
B.Avogadro
C.Proust
D.Faraday
正确答案：Mendeleev
5、How many elements are discovered up to 2019？（）
A.118
B.117
C.115
D.112
正确答案：118
6、What was found by Roentgen in 1895？（）
A.Proton
B.neutron
C.X ray
D.Electron
正确答案：X ray
7、The law of black-body radiation was given in 1900 by（）？
A.Plank
B.Boltzmann
C.Rutherford
D.Bohr
正确答案：Plank
8、Which model can exactly solve the Hydrogen system？（）
A.Bohr model
B.Schrodinger equation
C.Rutherford model
D.Dirac equation
正确答案：Dirac equation
9、Which field is not related to atomic physics？（）
A.Plasma physics
B.Astrophysics
C.Literature
D.Environment
正确答案：Literature
10、Who did not join the Solvay conference held in 1927？（）
A.Einstein
B.Pauli
C.Fermi
D.Schrodinger
正确答案：Einstein
第二章单元测试
1、State the mass of Avogadro’s number of atoms for Copper（）.
A.127.10 g
B.63.55 kg
C.23.22 g
D.63.55 g
正确答案：63.55 g
2、The mass of a single iron atom is 9.3 × 10–23 g.Determine the number if iron atoms in regular cube that measures exactly 10 cm on an edge.The density of iron is 7.86 g/cm3（）。
A.3.5 × 1025
B.8.5 × 1025
C.7.5 × 1024
D.4.2 × 1026
正确答案：8.5 × 1025
3、The mass of a proton is（）
A.0.511 MeV
B.1.673× 10-24 g
C.3.344× 10-27 kg
D.10.07 u
正确答案：1.673× 10-24 g
4、In Rutherford atomic model alpha particles were stroked on（）
A.titanium
B.aluminum
C.silver
D.gold
正确答案：gold
5、For aluminum（Z2 = 13） and gold（Z2 = 79 ）targets， what is the ratio of α particle scattering at any angle for equal numbers of scattering nuclei per unit area？（）
A.134.5
B.0.03
C.36.93
D.1.47
正确答案：36.93
6、For an 8.0-MeV α particle scattering from a gold atom（Z = 79 ） of radius 0.135 nm， the largest scattering angle， θ is ？（）
A.
B.
C.
D.
正确答案：
7、According to structure of atom electron should fall in（）？
A.nucleus
B.outer environment
C.shell
D.space
正确答案：nucleus
8、Which of the following is not a valid conclusion from Rutherford’s alpha particle scattering experiment？（）
A.The atom is mainly empty space
B.The nucleus must be positively charged
C.The nucleus must be very small compared to the atom
D.The mass of the atom is mostly concentrated in the nucleus
正确答案：The nucleus must be positively charged
9、A 5.0-MeV alpha particle approaches a gold nucleus with an impact parameter of 2.6×10-13 m.Through what angle will it be scattered？（）
A.10°
B.Plasma physics
C.Astrophysics
D.Environment
正确答案：10°
10、What fraction of a beam of 7.7-MeV alpha particles incident upon a gold foil 3.0×10-7 m thick is scattered by less than 1°？（）
A.1.35
B.0.67
C.0.05
D.0.84
正确答案：0.84
第三章单元测试
1、When an electron jumps from its orbit to another orbit， energy is（）.
A.absorbed
B.emitted
C.no effect
D.both
正确答案：both
2、What determines the difference in energy between two energy levels？（）
A.distance between the two energy levels
B.number of electrons in the energy levels
C.distance from the nucleus
D.number of valence electrons
正确答案：distance between the two energy levels
3、According to Bohr model of hydrogen atom， the radius of stationary obit characterized by the principal quantum number n is proportional（）
A.n2
B.n
C.1/n
D.1/n2
正确答案：n2
4、In hydrogen atom the angular momentum of the electron in the lowest energy state（）
A.2h
B.2p/h
C.h/2p
D.h/p
正确答案：h/2p
5、The ratio of the speed of the electron in the ground state of hydrogen atom to the speed of light is（）
A.2/137
B.1/237
C.1/2
D.1/137
正确答案：1/137
6、If the electron in hydrogen atom jumps from the third orbit to second orbit， the wavelength of th emitted radiation is given by（）
A.36/5R
B.5/R
C.5R/36
D.R/6
正确答案：36/5R
7、A proton and an electron， both at rest initially， combine to form a hydrogen atom in the ground state.A single photon is emit- ted in this process.What is its wavelength？（）
A.91.2 nm
B.15 mm
C.49 fm
D.357 nm
正确答案：91.2 nm
8、A beam of electrons bombards a sample of hydrogen.Through what potential difference must the electrons have been accelerated if the first line of the Balmer series is to be emitted？（）
A.569.3 V
B.35.7 V
C.0.6 V
D.12.1 V
正确答案：12.1 V
9、The longest wavelength in the Lyman series is 121.5 nm and the shortest wavelength in the Balmer series is 364.6 nm.Find the longest wavelength of light that could ionize hydrogen.（）
A.49.4 fm
B.91.13 nm
C.74.5 mm
D.8.3 nm
正确答案：91.13 nm
10、What is the shortest wavelength present in the Brackett series of spectral lines？（）
A.569.34 nm
B.327.89 nm
C.1.46 mm
D.91.13 nm
正确答案：1.46 mm
第四章单元测试
1、The energy quanta of an atomic oscillator that emits and absorbs orange light whose frequency is 5.00 ×1014 Hz is.（）.
A.7.13 eV
B.12.89 eV
C.3.89×10-19 J
D.2.08 eV
正确答案：2.08 eV
2、Ultraviolet light of wavelength 350 nm and intensity 1.00 W/m2 is directed at a potassium surface.The maximum kinetic energy of the photoelectrons is（）
A.17.6 eV
B.4.42×10-19 J
C.3.5 eV
D.6.9 eV
正确答案：3.5 eV
3、A metal surface illuminated by 8.5×1014 Hz light emits electrons whose maximum energy is 0.52 eV.The same surface illuminated by 12.0×1014 Hz light emits electrons whose maximum energy is 1.97 eV.The work function of the metal is（B ）。
A.3.0 eV
B.12.4 eV
C.47.5 eV
D.7.2 eV
正确答案：3.0 eV
4、The de Broglie wavelengths of a 46 g golf ball with a velocity of 30 m/s is（）
A.3.7×10-24 fm
B.3.7×10-24
C.4.8×10-24 nm
D.4.8×10-34 m
正确答案：4.8×10-34 m
5、The kinetic energy of a proton whose de Broglie wavelength is 1.0 fm is（）
A.938 MeV
B.617 MeV
C.1.555 GeV
D.347 MeV
正确答案：617 MeV
6、The experiment that confirms the existence of de Broglie waves is（）
A.Geiger-Marsden experiment
B.Davisson-Germer experiment
C.J.J.Thomson Experiment
D.Millikan experiment
正确答案：Davisson-Germer experiment
7、A measurement establishes the position of a proton with an accuracy of 1.00 Í10-11 m.The uncertainty in the proton’s position 1.00 s later is（）
A.3.15 km
B.578 nm
C.93.6 mm
D.4.26 m
正确答案：3.15 km
8、The expectation value <；x>； of the position of a particle trapped in a box L wide of infinite well is（）
A.L
B.0
C.L/2
D.L2/4
正确答案：L/2
9、The average value of 1/r for a 1s electron in the hydrogen atom is（）
A.2/a0
B.4a0
C.9a0
D.1/a0
正确答案：9a0
10、
A.0.0251
B.0.0251a2
C.a
D.a2
正确答案：0.0251a2
第五章单元测试
1、An electron whose orbital quantum number is 2 has the length of angular momentum（）.
A.2.6×10-34 J·s
B.2.08 eV
C.4
D.2h
正确答案：2.6×10-34 J·s
2、For a hydrogen atom in the 6f state， the minimum angle between the orbital angular momentum vector and the z axis is（）
A.60O
B.30O
C.90O
D.45O
正确答案：30O
3、
A.7.40×10-23 J
B.2.32×10-4 eV
C.1.16×10-4 eV
D.9.12×10-24 J
正确答案：2.32×10-4 eV
4、An experimenter wants to separate silver atoms in a Stern-Gerlach experiment by at least 1 cm（a large separation） as they exit the magnetic field.To heat the silver， she has an oven that can reach 1000°C and needs to order a suitable magnet.What should be the magnet specifications？（）
A.57 T·m
B.24 T·m
C.39 T·m
D.75 T·m
正确答案：57 T·m
5、The Lande factor of 2S1/2 is（）
A.1
B.0.67
C.3
D.2
正确答案：2
6、An energy difference of 4×10-3 eV for the 3p subshell of sodium accounts for the how many splitting of a spectral line at 589.3 nm is（）
A.1.2 nm
B.1.1 nm
C.1.8 nm
D.0.6 nm
正确答案：1.2 nm
7、The Bohr magneton is（）；
A.9.27×10-24 eV/T
B.9.27×10-24 J/T
C.9.27×10-23 J/K
D.9.27×10-25； J/T
正确答案：9.27×10-24 J/T
8、A sample of a certain element is placed in a 0.300 T magnetic field and suitably excited.How far apart are the Zeeman components of the 450 nm spectral line of this element？（）
A.1.45 nm
B.3.72 fm
C.2.83 pm
D.6.94 nm
正确答案：2.83 pm
9、In anomalous Zeeman effect， a level of give， s， l， j splits into（）
A.2s+1 levels
B.2l+1 levels
C.0 or 2j+1 levels
D.2j+1 levels
正确答案：0 or 2j+1 levels
10、An atom with the states 2G9/2 and 2H11/2 is placed in a weak magnetic field.How many transitions can be observed？（）
A.20
B.35
C.12
D.30
正确答案：30
第六章单元测试
1、The total spin of two electrons is（）.
A.1/2
B.1
C.1 or 0
D.0
正确答案：1/2
2、The maximum value of total angular momentum for electron with l=4（）
A.3.5
B.4
C.0
D.4.5
正确答案：4.5
3、The number of values allowed to total angular momentum j in Helium atom for a given non-zero l are（）
A.2
B.0
C.1
D.3
正确答案：3
4、The 3s state of Na has an energy of -5.14 eV.Its effective nuclear charge is（）
A.5e
B.1e
C.1.14 e
D.11e
正确答案：1.14 e
5、The ground state of carbon is（）
A.3P2
B.3S1
C.3P0
D.1D2
正确答案：3P0
6、A system of electrons is described by a wave function should be（）
A.trial
B.no requirement
C.symmetric
D.anti-symmetric
正确答案：anti-symmetric
7、The electron configuration of Neon is（）
A.1s22s22p5
B.1s22s22p4
C.1s22s22p6
D.1s22s22p63s
正确答案：1s22s22p6
8、
A.5
B.20
C.10
D.15
正确答案：20
9、What atoms have the configuration 1s22s22p63s2（）
A.Mg
B.Na
C.Al
D.Si
正确答案：Mg
10、How many electrons can be contained in M shell（）
A.20
B.18
C.8
D.2
正确答案：18
第七章单元测试
1、Who discovered the X ray（）.
A.Rontgen
B.Nobel
C.Einstein
D.Bohr
正确答案：Rontgen
2、If we have a tungsten anode（work function ；f=4.63 eV） and electron ；acceleration voltage of 35 kV， what is the minimum wavelength of the x rays？（）
A.4.58 fm
B.3.12 pm
C.0.0354 nm
D.3.89 nm
正确答案：3.12 pm
3、The continuum spectrum of X ray comes from（）
A.Pair production
B.Photoelectric effect
C.Auger electron
D.Bremsstrahlung
正确答案：Bremsstrahlung
4、A photon having 40 keV scatters from a free electron at rest.What is the maximum energy that the electron can obtain？（）
A.1.73 eV
B.5.41 eV
C.7.95 eV
D.4.32 eV
正确答案：5.41 eV
5、A photon of wavelength 2.0 nm Compton-scatters from an electron at an angle of 90°.What is the modified wavelength？（）
A.5.56730 nm
B.7.67945 nm
C.2.00243 nm
D.9.45891 nm
正确答案：2.00243 nm
6、The momentum of photons corresponding to the minimum wavelength emitted from x-ray tube whose operating voltage is 120 kV is（）
A.5.225X10-23 N·m
B.4.783X10-14 N·m
C.4.175X10-24 N·m
D.6.396X10-23 N·m
正确答案：6.396X10-23 N·m
7、An X-ray tube operates at 100 kV.The maximum speed of electrons striking the anticathode is（）
A.1.19X108 m/s
B.0.84 X108 m/s
C.1.33 X108 m/s
D.1.88 X108 m/s
正确答案：1.88 X108 m/s
8、If the K， L， and M energy levels of Pt are 78000 eV， 12000 eV and 30000 eV， respectively， the wavelength of Ka line from Pt is（）
A.92.6 pm
B.43.6 pm
C.14.3 pm
D.18.6 pm
正确答案：18.6 pm
9、When the atomic number of the anticathode is 79， the frequency of Ka line is（）
A.2.24X1019 s-1
B.9.21X1019 s-1
C.1.50X1019 s-1
D.4.57X1018 s-1
正确答案：2.24X1019 s-1
10、In Zn the ionization energy of K shell is 9.659 KeV and L shell 1.021 KeV.The kinetic energy of the Auger electron emitted from the L shell is（）
A.4.579 KeV
B.7.62 KeV
C.1.02 KeV
D.8.638 KeV
正确答案：7.62 KeV
第八章单元测试
1、Liquid helium（atomic weight 4.003） has a density r= 0.13 g/cm3.Estimate the radius of a He atom， assuming that the atoms are packed in the densest possible configuration， which fills 74% of the space.（）。
A.1.3 nm
B.0.5 nm
C.134.7 nm
D.20.8 nm
正确答案：20.8 nm
2、Through what angle is a 4 MeV a particle scattered when it approaches a gold nucleus with a impact parameter of 2.6 X 10-13 m？（）。
A.12.49o
B.24.98o
C.6.25o
D.49.96o
正确答案：12.49o
3、The energy of a hydrogen atom in the first excited state is（）
A.-0.85 eV
B.-13.6 eV
C.-3.4 eV
D.-1.51 eV
正确答案：-3.4 eV
4、On which of the following states of hydrogen the spin-orbit interaction has no effect？（）
A.p state
B.s state
C.f state
D.d state
正确答案：s state
5、How large is the magnetic field generated by the electron in the ground state of a hydrogen atom， at the position of the proton if it would circulate according to Bohr model on the shell n = 1？（）
A.6.27 T
B.7.98 T
C.3.11 T
D.12.54 T
正确答案：12.54 T
6、The Lande factor of 4D1/2； state is（）；
A.1.5
B.0
C.2
D.3
正确答案：0
7、The angle between the total and the orbital angular momenta in a 4D3/2 state is（）
A.101.54o
B.30o
C.25.38o
D.50.77o
正确答案：50.77o
8、How many lines can be expected for the 32D->；32P transition in sodium？（）
A.1
B.5
C.3
D.2
正确答案：3
9、The de Broglie wavelength of an electron with kinetic energy of 100 keV is（）
A.3.702 nm
B.3.702 pm
C.3.702 fm
D.3.702 mm
正确答案：3.702 pm
10、The work function for the photoelectric effect in potassium is 2.25 eV.For the case when light with a wavelength of 3.6 x 10-7 ；m falls on the potassium， the velocity of the fastest of the emitted electrons is（）
A.2.3X103； m/s
B.9.2X108 m/s
C.7.4X106； m/s
D.6.5X105； m/s
正确答案：6.5X105； m/s
第一章单元测试
1、The energy scale of atom is（）.
A.TeV
B.GeV
C.eV
D.MeV
正确答案：eV
2、The density scale of atom is（）
A.1010 g/cm3
B.1 g/cm3
C.1015 g/cm3
D.102 g/cm3
正确答案：1 g/cm3
3、Who did propose that the matter was indivisible in ancient Greece？（）
A.Plato
B.Aristotle
C.Democracy
D.Archimedes
正确答案：Democracy
4、Who did firstly show the Periodic table？（）
A.Mendeleev
B.Avogadro
C.Proust
D.Faraday
正确答案：Mendeleev
5、How many elements are discovered up to 2019？（）
A.118
B.117
C.115
D.112
正确答案：118
6、What was found by Roentgen in 1895？（）
A.Proton
B.neutron
C.X ray
D.Electron
正确答案：X ray
7、The law of black-body radiation was given in 1900 by（）？
A.Plank
B.Boltzmann
C.Rutherford
D.Bohr
正确答案：Plank
8、Which model can exactly solve the Hydrogen system？（）
A.Bohr model
B.Schrodinger equation
C.Rutherford model
D.Dirac equation
正确答案：Dirac equation
9、Which field is not related to atomic physics？（）
A.Plasma physics
B.Astrophysics
C.Literature
D.Environment
正确答案：Literature
10、Who did not join the Solvay conference held in 1927？（）
A.Einstein
B.Pauli
C.Fermi
D.Schrodinger
正确答案：Einstein
第二章单元测试
1、State the mass of Avogadro’s number of atoms for Copper（）.
A.127.10 g
B.63.55 kg
C.23.22 g
D.63.55 g
正确答案：63.55 g
2、The mass of a single iron atom is 9.3 × 10–23 g.Determine the number if iron atoms in regular cube that measures exactly 10 cm on an edge.The density of iron is 7.86 g/cm3（）。
A.3.5 × 1025
B.8.5 × 1025
C.7.5 × 1024
D.4.2 × 1026
正确答案：8.5 × 1025
3、The mass of a proton is（）
A.0.511 MeV
B.1.673× 10-24 g
C.3.344× 10-27 kg
D.10.07 u
正确答案：1.673× 10-24 g
4、In Rutherford atomic model alpha particles were stroked on（）
A.titanium
B.aluminum
C.silver
D.gold
正确答案：gold
5、For aluminum（Z2 = 13） and gold（Z2 = 79 ）targets， what is the ratio of α particle scattering at any angle for equal numbers of scattering nuclei per unit area？（）
A.134.5
B.0.03
C.36.93
D.1.47
正确答案：36.93
6、For an 8.0-MeV α particle scattering from a gold atom（Z = 79 ） of radius 0.135 nm， the largest scattering angle， θ is ？（）
A.
B.
C.
D.
正确答案：
7、According to structure of atom electron should fall in（）？
A.nucleus
B.outer environment
C.shell
D.space
正确答案：nucleus
8、Which of the following is not a valid conclusion from Rutherford’s alpha particle scattering experiment？（）
A.The atom is mainly empty space
B.The nucleus must be positively charged
C.The nucleus must be very small compared to the atom
D.The mass of the atom is mostly concentrated in the nucleus
正确答案：The nucleus must be positively charged
9、A 5.0-MeV alpha particle approaches a gold nucleus with an impact parameter of 2.6×10-13 m.Through what angle will it be scattered？（）
A.10°
B.Plasma physics
C.Astrophysics
D.Environment
正确答案：10°
10、What fraction of a beam of 7.7-MeV alpha particles incident upon a gold foil 3.0×10-7 m thick is scattered by less than 1°？（）
A.1.35
B.0.67
C.0.05
D.0.84
正确答案：0.84
第三章单元测试
1、When an electron jumps from its orbit to another orbit， energy is（）.
A.absorbed
B.emitted
C.no effect
D.both
正确答案：both
2、What determines the difference in energy between two energy levels？（）
A.distance between the two energy levels
B.number of electrons in the energy levels
C.distance from the nucleus
D.number of valence electrons
正确答案：distance between the two energy levels
3、According to Bohr model of hydrogen atom， the radius of stationary obit characterized by the principal quantum number n is proportional（）
A.n2
B.n
C.1/n
D.1/n2
正确答案：n2
4、In hydrogen atom the angular momentum of the electron in the lowest energy state（）
A.2h
B.2p/h
C.h/2p
D.h/p
正确答案：h/2p
5、The ratio of the speed of the electron in the ground state of hydrogen atom to the speed of light is（）
A.2/137
B.1/237
C.1/2
D.1/137
正确答案：1/137
6、If the electron in hydrogen atom jumps from the third orbit to second orbit， the wavelength of th emitted radiation is given by（）
A.36/5R
B.5/R
C.5R/36
D.R/6
正确答案：36/5R
7、A proton and an electron， both at rest initially， combine to form a hydrogen atom in the ground state.A single photon is emit- ted in this process.What is its wavelength？（）
A.91.2 nm
B.15 mm
C.49 fm
D.357 nm
正确答案：91.2 nm
8、A beam of electrons bombards a sample of hydrogen.Through what potential difference must the electrons have been accelerated if the first line of the Balmer series is to be emitted？（）
A.569.3 V
B.35.7 V
C.0.6 V
D.12.1 V
正确答案：12.1 V
9、The longest wavelength in the Lyman series is 121.5 nm and the shortest wavelength in the Balmer series is 364.6 nm.Find the longest wavelength of light that could ionize hydrogen.（）
A.49.4 fm
B.91.13 nm
C.74.5 mm
D.8.3 nm
正确答案：91.13 nm
10、What is the shortest wavelength present in the Brackett series of spectral lines？（）
A.569.34 nm
B.327.89 nm
C.1.46 mm
D.91.13 nm
正确答案：1.46 mm
第四章单元测试
1、The energy quanta of an atomic oscillator that emits and absorbs orange light whose frequency is 5.00 ×1014 Hz is.（）.
A.7.13 eV
B.12.89 eV
C.3.89×10-19 J
D.2.08 eV
正确答案：2.08 eV
2、Ultraviolet light of wavelength 350 nm and intensity 1.00 W/m2 is directed at a potassium surface.The maximum kinetic energy of the photoelectrons is（）
A.17.6 eV
B.4.42×10-19 J
C.3.5 eV
D.6.9 eV
正确答案：3.5 eV
3、A metal surface illuminated by 8.5×1014 Hz light emits electrons whose maximum energy is 0.52 eV.The same surface illuminated by 12.0×1014 Hz light emits electrons whose maximum energy is 1.97 eV.The work function of the metal is（B ）。
A.3.0 eV
B.12.4 eV
C.47.5 eV
D.7.2 eV
正确答案：3.0 eV
4、The de Broglie wavelengths of a 46 g golf ball with a velocity of 30 m/s is（）
A.3.7×10-24 fm
B.3.7×10-24
C.4.8×10-24 nm
D.4.8×10-34 m
正确答案：4.8×10-34 m
5、The kinetic energy of a proton whose de Broglie wavelength is 1.0 fm is（）
A.938 MeV
B.617 MeV
C.1.555 GeV
D.347 MeV
正确答案：617 MeV
6、The experiment that confirms the existence of de Broglie waves is（）
A.Geiger-Marsden experiment
B.Davisson-Germer experiment
C.J.J.Thomson Experiment
D.Millikan experiment
正确答案：Davisson-Germer experiment
7、A measurement establishes the position of a proton with an accuracy of 1.00 Í10-11 m.The uncertainty in the proton’s position 1.00 s later is（）
A.3.15 km
B.578 nm
C.93.6 mm
D.4.26 m
正确答案：3.15 km
8、The expectation value <；x>； of the position of a particle trapped in a box L wide of infinite well is（）
A.L
B.0
C.L/2
D.L2/4
正确答案：L/2
9、The average value of 1/r for a 1s electron in the hydrogen atom is（）
A.2/a0
B.4a0
C.9a0
D.1/a0
正确答案：9a0
10、
A.0.0251
B.0.0251a2
C.a
D.a2
正确答案：0.0251a2
第五章单元测试
1、An electron whose orbital quantum number is 2 has the length of angular momentum（）.
A.2.6×10-34 J·s
B.2.08 eV
C.4
D.2h
正确答案：2.6×10-34 J·s
2、For a hydrogen atom in the 6f state， the minimum angle between the orbital angular momentum vector and the z axis is（）
A.60O
B.30O
C.90O
D.45O
正确答案：30O
3、
A.7.40×10-23 J
B.2.32×10-4 eV
C.1.16×10-4 eV
D.9.12×10-24 J
正确答案：2.32×10-4 eV
4、An experimenter wants to separate silver atoms in a Stern-Gerlach experiment by at least 1 cm（a large separation） as they exit the magnetic field.To heat the silver， she has an oven that can reach 1000°C and needs to order a suitable magnet.What should be the magnet specifications？（）
A.57 T·m
B.24 T·m
C.39 T·m
D.75 T·m
正确答案：57 T·m
5、The Lande factor of 2S1/2 is（）
A.1
B.0.67
C.3
D.2
正确答案：2
6、An energy difference of 4×10-3 eV for the 3p subshell of sodium accounts for the how many splitting of a spectral line at 589.3 nm is（）
A.1.2 nm
B.1.1 nm
C.1.8 nm
D.0.6 nm
正确答案：1.2 nm
7、The Bohr magneton is（）；
A.9.27×10-24 eV/T
B.9.27×10-24 J/T
C.9.27×10-23 J/K
D.9.27×10-25； J/T
正确答案：9.27×10-24 J/T
8、A sample of a certain element is placed in a 0.300 T magnetic field and suitably excited.How far apart are the Zeeman components of the 450 nm spectral line of this element？（）
A.1.45 nm
B.3.72 fm
C.2.83 pm
D.6.94 nm
正确答案：2.83 pm
9、In anomalous Zeeman effect， a level of give， s， l， j splits into（）
A.2s+1 levels
B.2l+1 levels
C.0 or 2j+1 levels
D.2j+1 levels
正确答案：0 or 2j+1 levels
10、An atom with the states 2G9/2 and 2H11/2 is placed in a weak magnetic field.How many transitions can be observed？（）
A.20
B.35
C.12
D.30
正确答案：30
第六章单元测试
1、The total spin of two electrons is（）.
A.1/2
B.1
C.1 or 0
D.0
正确答案：1/2
2、The maximum value of total angular momentum for electron with l=4（）
A.3.5
B.4
C.0
D.4.5
正确答案：4.5
3、The number of values allowed to total angular momentum j in Helium atom for a given non-zero l are（）
A.2
B.0
C.1
D.3
正确答案：3
4、The 3s state of Na has an energy of -5.14 eV.Its effective nuclear charge is（）
A.5e
B.1e
C.1.14 e
D.11e
正确答案：1.14 e
5、The ground state of carbon is（）
A.3P2
B.3S1
C.3P0
D.1D2
正确答案：3P0
6、A system of electrons is described by a wave function should be（）
A.trial
B.no requirement
C.symmetric
D.anti-symmetric
正确答案：anti-symmetric
7、The electron configuration of Neon is（）
A.1s22s22p5
B.1s22s22p4
C.1s22s22p6
D.1s22s22p63s
正确答案：1s22s22p6
8、
A.5
B.20
C.10
D.15
正确答案：20
9、What atoms have the configuration 1s22s22p63s2（）
A.Mg
B.Na
C.Al
D.Si
正确答案：Mg
10、How many electrons can be contained in M shell（）
A.20
B.18
C.8
D.2
正确答案：18
第七章单元测试
1、Who discovered the X ray（）.
A.Rontgen
B.Nobel
C.Einstein
D.Bohr
正确答案：Rontgen
2、If we have a tungsten anode（work function ；f=4.63 eV） and electron ；acceleration voltage of 35 kV， what is the minimum wavelength of the x rays？（）
A.4.58 fm
B.3.12 pm
C.0.0354 nm
D.3.89 nm
正确答案：3.12 pm
3、The continuum spectrum of X ray comes from（）
A.Pair production
B.Photoelectric effect
C.Auger electron
D.Bremsstrahlung
正确答案：Bremsstrahlung
4、A photon having 40 keV scatters from a free electron at rest.What is the maximum energy that the electron can obtain？（）
A.1.73 eV
B.5.41 eV
C.7.95 eV
D.4.32 eV
正确答案：5.41 eV
5、A photon of wavelength 2.0 nm Compton-scatters from an electron at an angle of 90°.What is the modified wavelength？（）
A.5.56730 nm
B.7.67945 nm
C.2.00243 nm
D.9.45891 nm
正确答案：2.00243 nm
6、The momentum of photons corresponding to the minimum wavelength emitted from x-ray tube whose operating voltage is 120 kV is（）
A.5.225X10-23 N·m
B.4.783X10-14 N·m
C.4.175X10-24 N·m
D.6.396X10-23 N·m
正确答案：6.396X10-23 N·m
7、An X-ray tube operates at 100 kV.The maximum speed of electrons striking the anticathode is（）
A.1.19X108 m/s
B.0.84 X108 m/s
C.1.33 X108 m/s
D.1.88 X108 m/s
正确答案：1.88 X108 m/s
8、If the K， L， and M energy levels of Pt are 78000 eV， 12000 eV and 30000 eV， respectively， the wavelength of Ka line from Pt is（）
A.92.6 pm
B.43.6 pm
C.14.3 pm
D.18.6 pm
正确答案：18.6 pm
9、When the atomic number of the anticathode is 79， the frequency of Ka line is（）
A.2.24X1019 s-1
B.9.21X1019 s-1
C.1.50X1019 s-1
D.4.57X1018 s-1
正确答案：2.24X1019 s-1
10、In Zn the ionization energy of K shell is 9.659 KeV and L shell 1.021 KeV.The kinetic energy of the Auger electron emitted from the L shell is（）
A.4.579 KeV
B.7.62 KeV
C.1.02 KeV
D.8.638 KeV
正确答案：7.62 KeV
第八章单元测试
1、Liquid helium（atomic weight 4.003） has a density r= 0.13 g/cm3.Estimate the radius of a He atom， assuming that the atoms are packed in the densest possible configuration， which fills 74% of the space.（）。
A.1.3 nm
B.0.5 nm
C.134.7 nm
D.20.8 nm
正确答案：20.8 nm
2、Through what angle is a 4 MeV a particle scattered when it approaches a gold nucleus with a impact parameter of 2.6 X 10-13 m？（）。
A.12.49o
B.24.98o
C.6.25o
D.49.96o
正确答案：12.49o
3、The energy of a hydrogen atom in the first excited state is（）
A.-0.85 eV
B.-13.6 eV
C.-3.4 eV
D.-1.51 eV
正确答案：-3.4 eV
4、On which of the following states of hydrogen the spin-orbit interaction has no effect？（）
A.p state
B.s state
C.f state
D.d state
正确答案：s state
5、How large is the magnetic field generated by the electron in the ground state of a hydrogen atom， at the position of the proton if it would circulate according to Bohr model on the shell n = 1？（）
A.6.27 T
B.7.98 T
C.3.11 T
D.12.54 T
正确答案：12.54 T
6、The Lande factor of 4D1/2； state is（）；
A.1.5
B.0
C.2
D.3
正确答案：0
7、The angle between the total and the orbital angular momenta in a 4D3/2 state is（）
A.101.54o
B.30o
C.25.38o
D.50.77o
正确答案：50.77o
8、How many lines can be expected for the 32D->；32P transition in sodium？（）
A.1
B.5
C.3
D.2
正确答案：3
9、The de Broglie wavelength of an electron with kinetic energy of 100 keV is（）
A.3.702 nm
B.3.702 pm
C.3.702 fm
D.3.702 mm
正确答案：3.702 pm
10、The work function for the photoelectric effect in potassium is 2.25 eV.For the case when light with a wavelength of 3.6 x 10-7 ；m falls on the potassium， the velocity of the fastest of the emitted electrons is（）
A.2.3X103； m/s
B.9.2X108 m/s
C.7.4X106； m/s
D.6.5X105； m/s
正确答案：6.5X105； m/s