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原子物理

1The energy scale of atom is（）
2The density scale of atom is（）
3Who did propose that the matter was indivisible in ancient Greece？（）
4Who did firstly show the Periodic table？（）
5How many elements are discovered up to 2019？（）
6What was found by Roentgen in 1895？（）
7The law of black-body radiation was given in 1900 by（）？
8Which model can exactly solve the Hydrogen system？（）
9Which field is not related to atomic physics？（）
10Who did not join the Solvay conference held in 1927？（）
11State the mass of Avogadro’s number of atoms for Copper（）
12The mass of a single iron atom is 93 × 10–23 gDetermine the number if iron atoms in regular cube that measures exactly 10 cm on an edgeThe density of iron is 786 g/cm3（）。
13The mass of a proton is（）
14In Rutherford atomic model alpha particles were stroked on（）
15For 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？（）
16For an 80-MeV α particle scattering from a gold atom（Z = 79 ） of radius 0135 nm， the largest scattering angle， θ is ？（）
17According to structure of atom electron should fall in（）？
18Which of the following is not a valid conclusion from Rutherford’s alpha particle scattering experiment？（）
19A 50-MeV alpha particle approaches a gold nucleus with an impact parameter of 26×10-13 mThrough what angle will it be scattered？（）
20What fraction of a beam of 77-MeV alpha particles incident upon a gold foil 30×10-7 m thick is scattered by less than 1°？（）
21When an electron jumps from its orbit to another orbit， energy is（）
22What determines the difference in energy between two energy levels？（）
23According to Bohr model of hydrogen atom， the radius of stationary obit characterized by the principal quantum number n is proportional（）
24In hydrogen atom the angular momentum of the electron in the lowest energy state（）
25The ratio of the speed of the electron in the ground state of hydrogen atom to the speed of light is（）
26If the electron in hydrogen atom jumps from the third orbit to second orbit， the wavelength of th emitted radiation is given by（）
27A proton and an electron， both at rest initially， combine to form a hydrogen atom in the ground stateA single photon is emit- ted in this processWhat is its wavelength？（）
28A beam of electrons bombards a sample of hydrogenThrough what potential difference must the electrons have been accelerated if the first line of the Balmer series is to be emitted？（）
29The longest wavelength in the Lyman series is 1215 nm and the shortest wavelength in the Balmer series is 3646 nmFind the longest wavelength of light that could ionize hydrogen（）
30What is the shortest wavelength present in the Brackett series of spectral lines？（）
31The energy quanta of an atomic oscillator that emits and absorbs orange light whose frequency is 500 ×1014 Hz is（）
32Ultraviolet light of wavelength 350 nm and intensity 100 W/m2 is directed at a potassium surfaceThe maximum kinetic energy of the photoelectrons is（）
33A metal surface illuminated by 85×1014 Hz light emits electrons whose maximum energy is 052 eVThe same surface illuminated by 120×1014 Hz light emits electrons whose maximum energy is 197 eVThe work function of the metal is（B ）。
34The de Broglie wavelengths of a 46 g golf ball with a velocity of 30 m/s is（）
35The kinetic energy of a proton whose de Broglie wavelength is 10 fm is（）
36The experiment that confirms the existence of de Broglie waves is（）
37A measurement establishes the position of a proton with an accuracy of 100 í10-11 mThe uncertainty in the proton’s position 100 s later is（）
38The expectation value <；x>； of the position of a particle trapped in a box L wide of infinite well is（）
39The average value of 1/r for a 1s electron in the hydrogen atom is（）
40A00251
41An electron whose orbital quantum number is 2 has the length of angular momentum（）
42For a hydrogen atom in the 6f state， the minimum angle between the orbital angular momentum vector and the z axis is（）
43A740×10-23 J
44An experimenter wants to separate silver atoms in a Stern-Gerlach experiment by at least 1 cm（a large separation） as they exit the magnetic fieldTo heat the silver， she has an oven that can reach 1000°C and needs to order a suitable magnetWhat should be
45The Lande factor of 2S1/2 is（）
46An energy difference of 4×10-3 eV for the 3p subshell of sodium accounts for the how many splitting of a spectral line at 5893 nm is（）
47The Bohr magneton is（）；
48A sample of a certain element is placed in a 0300 T magnetic field and suitably excitedHow far apart are the Zeeman components of the 450 nm spectral line of this element？（）
49In anomalous Zeeman effect， a level of give， s， l， j splits into（）
50An atom with the states 2G9/2 and 2H11/2 is placed in a weak magnetic fieldHow many transitions can be observed？（）
51The total spin of two electrons is（）
52The maximum value of total angular momentum for electron with l=4（）
53The number of values allowed to total angular momentum j in Helium atom for a given non-zero l are（）
54The 3s state of Na has an energy of -514 eVIts effective nuclear charge is（）
55The ground state of carbon is（）
56A system of electrons is described by a wave function should be（）
57The electron configuration of Neon is（）
58A5
59What atoms have the configuration 1s22s22p63s2（）
60How many electrons can be contained in M shell（）
61Who discovered the X ray（）
62If we have a tungsten anode（work function ；f=463 eV） and electron ；acceleration voltage of 35 kV， what is the minimum wavelength of the x rays？（）
63The continuum spectrum of X ray comes from（）
64A photon having 40 keV scatters from a free electron at restWhat is the maximum energy that the electron can obtain？（）
65A photon of wavelength 20 nm Compton-scatters from an electron at an angle of 90°What is the modified wavelength？（）
66The momentum of photons corresponding to the minimum wavelength emitted from x-ray tube whose operating voltage is 120 kV is（）
67An X-ray tube operates at 100 kVThe maximum speed of electrons striking the anticathode is（）
68If 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（）
69When the atomic number of the anticathode is 79， the frequency of Ka line is（）
70In Zn the ionization energy of K shell is 9659 KeV and L shell 1021 KeVThe kinetic energy of the Auger electron emitted from the L shell is（）
71Liquid helium（atomic weight 4003） has a density r= 013 g/cm3Estimate the radius of a He atom， assuming that the atoms are packed in the densest possible configuration， which fills 74% of the space（）。
72Through what angle is a 4 MeV a particle scattered when it approaches a gold nucleus with a impact parameter of 26 X 10-13 m？（）。
73The energy of a hydrogen atom in the first excited state is（）
74On which of the following states of hydrogen the spin-orbit interaction has no effect？（）
75How 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？（）
76The Lande factor of 4D1/2； state is（）；
77The angle between the total and the orbital angular momenta in a 4D3/2 state is（）
78How many lines can be expected for the 32D->；32P transition in sodium？（）
79The de Broglie wavelength of an electron with kinetic energy of 100 keV is（）
80The work function for the photoelectric effect in potassium is 225 eVFor the case when light with a wavelength of 36 x 10-7 ；m falls on the potassium， the velocity of the fastest of the emitted electrons is（）
81智慧树知到《原子物理》章节测试答案
82原子物理学属近代物理学课程，它是关于（）的一门科学。
83原子物理学的主要内容是（）。
84从狭义上说，原子物理学是研究原子的结构和性质的一门科学。（）
85原子物理是联系普通物理和理论物理的桥梁。（）
86原子物理和核物理的研究为核技术和核能开发奠定了基础，激光的发现带来了光通信技术的发展，这些实例表明解决技术问题经常需要新的科学知识（）