2021知到答案 原子物理 智慧树网课章节测试答案

第一章 章节测试

1、选择题:The energy scale of atom is (   ). 
选项:
A:MeV
B: GeV
C: eV
D: TeV
答案: 【 eV
2、选择题:The density scale of atom is (    ) 
选项:
A:102 g/cm
B:1 g/cm
C:1015 g/cm
D:1010 g/cm3
答案: 【1 g/cm
3、选择题:Who did propose that the matter was indivisible in ancient Greece? (    ) 
选项:
A:Plato
B:Aristotle
C:Archimedes
D:Democracy
答案: 【Democracy
4、选择题: Who did firstly show the Periodic table?  (    )  
选项:
A:Mendeleev 
B:Avogadro 
C:Proust
D:Faraday 
答案: 【Mendeleev 
5、选择题: How many elements are discovered up to 2019? (    ) 
选项:
A:112  
B:115
C:117
D:118
答案: 【118
6、选择题:What was found by Roentgen in 1895? (    )
选项:
A:Electron
B:Proton 
C:X ray 
D:neutron
答案: 【X ray 
7、选择题:The law of black-body radiation was given in 1900 by (    )? 
选项:
A:Rutherford
B:Plank
C:Bohr
D:Boltzmann
答案: 【Plank
8、选择题:Which model can exactly solve the Hydrogen system? (   )
选项:
A:Dirac equation 
B:Schrodinger equation
C:Bohr model
D:Rutherford model 
答案: 【Dirac equation 
9、选择题:Which field is not related to atomic physics? (    ) 
选项:
A:Astrophysics
B:Plasma physics 
C:Literature
D:Environment
答案: 【Literature
10、选择题: Who did not join the Solvay conference held in 1927? (   )  
选项:
A:Einstein
B:Schrodinger
C:Pauli 
D:Fermi  
答案: 【Einstein

第二章 章节测试

1、选择题:State the mass of Avogadro’s number of atoms for Copper (   ).  
选项:
A:23.22 g
B:63.55 g 
C:63.55 kg
D:127.10 g
答案: 【63.55 g 
2、选择题: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  (   )
选项:
A:7.5 × 1024  
B:3.5 × 1025 
C:8.5 × 1025
D:4.2 × 1026
答案: 【8.5 × 1025
3、选择题:The mass of a proton is (    ) 
选项:
A:1.673× 10-24
B: 0.511 MeV
C:10.07 u
D:3.344× 10-27 kg
答案: 【1.673× 10-24
4、选择题:In Rutherford atomic model alpha particles were stroked on  (    )  
选项:
A:aluminum 
B:gold 
C:silver
D:titanium
答案: 【gold 
5、选择题: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? (     ) 
选项:
A:0.03 
B:1.47 
C:134.5
D:36.93
答案: 【36.93
6、选择题: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 ? (    ) 
选项:
A:
 image.png
B:
image.png
C:
image.png
D:
image.png
答案: 【
 image.png

7、选择题:According to structure of atom electron should fall in (   )?  
选项:
A:nucleus
B:shell 
C:outer environment
D:space
答案: 【nucleus
8、选择题:Which of the following is not a valid conclusion from Rutherford’s alpha particle scattering experiment? (    ) 
选项:
A:The atom is mainly empty space 
B:The mass of the atom is mostly concentrated in the nucleus 
C:The nucleus must be positively charged 
D:The nucleus must be very small compared to the atom
答案: 【The nucleus must be positively charged 
9、选择题: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? (    )
选项:
A:Astrophysics
B:Plasma physics  
C:10° 
D: Environment
答案: 【10° 
10、选择题: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°? (   ) 
选项:
A: 0.67 
B:0.84
C:1.35 
D:0.05 
答案: 【0.84

第三章 章节测试

1、选择题:When an electron jumps from its orbit to another orbit, energy is (   ).  
选项:
A:emitted 
B:absorbed 
C:both
D:no effect 
答案: 【both】[$]
2、选择题: What determines the difference in energy between two energy levels? (   ) 
选项:
A:distance from the nucleus
B:number of electrons in the energy levels 
C:number of valence electrons
D:distance between the two energy levels
答案: 【distance between the two energy levels
3、选择题:According to Bohr model of hydrogen atom, the radius of stationary obit characterized by the principal quantum number n is proportional (    )   
选项:
A:1/n
B: n 
C:1/n
D:n
答案: 【n
4、选择题:In hydrogen atom the angular momentum of the electron in the lowest energy state   (   )  
选项:
A:2h
B:h/2p
C:2p/h
D:h/p
答案: 【h/2p
5、选择题:The ratio of the speed of the electron in the ground state of hydrogen atom to the speed of light is  (    ) 
选项:
A:1/237 
B:2/137
C:1/137 
D:1/2
答案: 【1/137 
6、选择题:If the electron in hydrogen atom jumps from the third orbit to second orbit, the wavelength of th emitted radiation is given by (    ) 
选项:
A:5/R 
B:36/5R
C:5R/36
D:R/6
答案: 【36/5R
7、选择题: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? (    )
选项:
A:357 nm
B:15 mm
C:49 fm
D:91.2 nm
答案: 【91.2 nm
8、选择题: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? (   ) 
选项:
A:35.7 V 
B:12.1 V 
C:0.6 V
D:569.3 V
答案: 【12.1 V 
9、选择题: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. (    ) 
选项:
A:74.5 mm
B:8.3 nm
C:91.13 nm
D:49.4 fm
答案: 【91.13 nm
10、选择题:What is the shortest wavelength present in the Brackett series of spectral lines? (  )  
选项:
A:1.46 mm
B:569.34 nm
C:91.13 nm
D:327.89 nm
答案: 【1.46 mm

第四章 章节测试

1、选择题:The energy quanta of an atomic oscillator that emits and absorbs orange light whose frequency is 5.00 ×1014 Hz is. (  ). 
选项:
A:12.89 eV
B:3.89×10-19 J 
C:7.13 eV 
D:2.08 eV 
答案: 【2.08 eV 
2、选择题: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 (   )
选项:
A:3.5 eV
B:6.9 eV
C:17.6 eV
D:4.42×10-19 J
答案: 【3.5 eV
3、选择题: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 )
选项:
A:7.2 eV
B:3.0 eV
C:12.4 eV
D:47.5 eV
答案: 【3.0 eV

4、选择题:The de Broglie wavelengths of a 46 g golf ball with a velocity of 30 m/s is (   )
选项:
A:3.7×10-24
B:4.8×10-24 nm
C:4.8×10-34 m
D:3.7×10-24 fm
答案: 【4.8×10-34 m
5、选择题:The kinetic energy of a proton whose de Broglie wavelength is 1.0 fm is   (    )
选项:
A:1.555 GeV
B:938 MeV
C:617 MeV
D:347 MeV
答案: 【617 MeV

6、选择题:The experiment that confirms the existence of de Broglie waves is (  )
选项:
A:Millikan experiment
B:Geiger-Marsden experiment
C:J. J. Thomson Experiment
D:Davisson-Germer experiment
答案: 【Davisson-Germer experiment

7、选择题: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 (   )
选项:
A:3.15 km
B:4.26 m 
C:578 nm
D:93.6 mm
答案: 【3.15 km

8、选择题:The expectation value <x> of the position of a particle trapped in a box L wide of infinite well is (   )
选项:
A: L
B:L/2
C:0
D: L2/4
答案: 【L/2

9、选择题:

The average value of 1/r for a 1s electron in the hydrogen atom is (   )
选项:
A:1/a0
B:2/a0
C:4a0
D: 9a0
答案: 【 9a0

10、选择题:图片.png
选项:
A:a2
B:a
C:0.0251a2
D:0.0251
答案: 【0.0251a2

第五章 章节测试

1、选择题:An electron whose orbital quantum number is 2 has the length of angular momentum (   ).
选项:
A:2h
B:2.6×10-34 J·s
C: 4
D:2.08 eV
答案: 【2.6×10-34 J·s

2、选择题:For a hydrogen atom in the 6f state, the minimum angle between the orbital angular momentum vector and the z axis is (  )
选项:
A:45O
B:90O
C:30O
D:60O
答案: 【30O

3、选择题:图片.png
选项:
A:1.16×10-4 eV
B:9.12×10-24 J
C:7.40×10-23 J
D:2.32×10-4 eV
答案: 【2.32×10-4 eV

4、选择题: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? (   )
选项:
A:57 T·m
B:39 T·m
C:75 T·m
D:24 T·m
答案: 【57 T·m

5、选择题:The Lande factor of 2S1/2 is (   )
选项:
A:0.67
B:1
C:3
D:2
答案: 【2
6、选择题: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 (  )
选项:
A:1.1 nm
B:0.6 nm
C:1.2 nm
D:1.8 nm
答案: 【1.2 nm
7、选择题:The Bohr magneton is (   )   
选项:
A:9.27×10-23 J/K
B:9.27×10-24 J/T
C:9.27×10-24 eV/T
D:9.27×10-25  J/T
答案: 【9.27×10-24 J/T

8、选择题: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?  (   )
选项:
A:2.83 pm
B:1.45 nm
C:3.72 fm
D:6.94 nm
答案: 【2.83 pm

9、选择题:In anomalous Zeeman effect, a level of give, s, l, j splits into (    )
选项:
A:2l+1 levels
B:2s+1 levels
C:2j+1 levels
D:0 or 2j+1 levels
答案: 【0 or 2j+1 levels

10、选择题:An atom with the states 2G9/2 and 2H11/2 is placed in a weak magnetic field. How many transitions can be observed? (   )
选项:
A:12
B:20
C:35
D:30
答案: 【30

第六章 章节测试

1、选择题:The total spin of two electrons is (   ).
选项:
A:1
B:0
C:1/2
D:1 or 0
答案: 【1/2

2、选择题:The maximum value of total angular momentum for electron with l=4 (   )
选项:
A:4.5
B:4
C:3.5
D:0
答案: 【4.5

3、选择题:The number of values allowed to total angular momentum j in Helium atom for a given non-zero l are  (   )
选项:
A:1
B:3
C:2
D:0
答案: 【3

4、选择题:The 3s state of Na has an energy of -5.14 eV. Its effective nuclear charge is (  )
选项:
A:11e

B:1e
C:5e
D:1.14 e
答案: 【1.14 e
5、选择题:The ground state of carbon is (   )
选项:
A:3S1
B:3P0
C: 3P2
D:1D2
答案: 【3P0

6、选择题: A system of electrons is described by a wave function should be (  )
选项:
A:anti-symmetric
B:symmetric
C:trial
D:no requirement
答案: 【anti-symmetric

7、选择题:The electron configuration of Neon is  (  )
选项:
A:1s22s22p5
B:1s22s22p63s
C:1s22s22p4
D:1s22s22p6
答案: 【1s22s22p6
8、选择题:图片.png
选项:
A:15
B:20
C:10
D:5
答案: 【20
9、选择题:What atoms have the configuration 1s22s22p63s2 (    )
选项:
A: Al
B:Na
C:Mg
D: Si
答案: 【Mg
10、选择题:How many electrons can be contained in M shell (   )
选项:
A:2
B:18
C:20
D:8
答案: 【18

第七章 章节测试

1、选择题:Who discovered the X ray (  ).
选项:
A:Nobel
B:Rontgen
C:Einstein
D:Bohr
答案: 【Rontgen

2、选择题: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? (   )
选项:
A:3.89 nm
B: 0.0354 nm
C:3.12 pm
D:4.58 fm
答案: 【3.12 pm

3、选择题:The continuum spectrum of X ray comes from  (   )
选项:
A:Photoelectric effect
B:Auger electron
C:Pair production
D:Bremsstrahlung
答案: 【Bremsstrahlung
4、选择题:A photon having 40 keV scatters from a free electron at rest. What is the maximum energy that the electron can obtain? (  )
选项:
A:5.41 eV
B: 4.32 eV
C:7.95 eV
D:1.73 eV
答案: 【5.41 eV

5、选择题:A photon of wavelength 2.0 nm Compton-scatters from an electron at an angle of 90°. What is the modified wavelength? (    )
选项:
A: 2.00243 nm
B:7.67945 nm
C:5.56730 nm
D:9.45891 nm
答案: 【 2.00243 nm

6、选择题:The momentum of photons corresponding to the minimum wavelength emitted from x-ray tube whose operating voltage is 120 kV is (  )
选项:
A:4.783X10-14 N·m
B:6.396X10-23 N·m
C:4.175X10-24 N·m
D:5.225X10-23 N·m
答案: 【6.396X10-23 N·m

7、选择题:An X-ray tube operates at 100 kV. The maximum speed of electrons striking the anticathode is (    )
选项:
A:1.19X108 m/s
B:0.84 X108 m/s
C:1.33 X108 m/s
D:1.88 X108 m/s
答案: 【1.88 X108 m/s
8、选择题: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   (  )
选项:
A:18.6 pm
B:14.3 pm
C:43.6 pm
D:92.6 pm
答案: 【18.6 pm

9、选择题:When the atomic number of the anticathode is 79, the frequency of Ka line is  (    )
选项:
A:4.57X1018 s-1
B:9.21X1019 s-1
C:2.24X1019 s-1
D: 1.50X1019 s-1
答案: 【2.24X1019 s-1

10、选择题: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 (   )
选项:
A:7.62 KeV
B:1.02 KeV
C:8.638 KeV
D:4.579 KeV
答案: 【7.62 KeV

第八章 章节测试

1、选择题: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. (    )
选项:
A:134.7 nm 
B:0.5 nm
C:1.3 nm
D:20.8 nm
答案: 【20.8 nm
2、选择题: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? (    )
选项:
A:6.25o
B:12.49o
C:24.98o
D:49.96o
答案: 【12.49o
3、选择题:The energy of a hydrogen atom in the first excited state is  (    ) 
选项:
A:-3.4 eV
B:-13.6 eV 
C:-0.85 eV 
D:-1.51 eV 
答案: 【-3.4 eV
4、选择题:On which of the following states of hydrogen the spin-orbit interaction has no effect? (   )
选项:
A: p state
B:d state
C:s state
D: f state
答案: 【s state
5、选择题: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? (    )
选项:
A:3.11 T
B:12.54 T
C:6.27 T
D:7.98 T
答案: 【12.54 T
6、选择题:The Lande factor of 4D1/2  state is (   )    
选项:
A:2
B:3
C:1.5
D: 0
答案: 【 0
7、选择题:The angle between the total and the orbital angular momenta in a 4D3/2 state is (    )
选项:
A:50.77o
B:25.38o
C:101.54o
D:30
答案: 【50.77o
8、选择题:How many lines can be expected for the 32D->32P transition in sodium? (   )
选项:
A:2
B:1
C:5
D:3
答案: 【3
9、选择题:The de Broglie wavelength of an electron with kinetic energy of 100 keV is  (    )
选项:
A:3.702 pm
B:3.702 nm
C:3.702 fm
D:3.702 mm
答案: 【3.702 pm
10、选择题: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 (   )
选项:
A:2.3X10m/s
B:7.4X10m/s
C:6.5X10m/s
D:9.2X108 m/s
答案: 【6.5X10m/s】[/$]

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