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atom

1古希腊文"atom"的含义是什么?（）
2The third type of point defect is impurity atom Impurities can be classified as（）间隙 impurity atom or（）置换impurity atom
3The vacancy is in the same direction as the atom
4Organic molecule can contain metal atom
5Atom在希腊语中是什么意思？
6古希腊认为atom的意思是（）。
7请判断下面单词的音节个数atom音标[‘?t?m]释义n原子;微粒;微量
8The energy scale of atom is（）
9The density scale of atom is（）
10atom在古希腊被认为是（）的意思。
11古希腊时期，atom的意思是指（）。
12"atom"这个词在古希腊文中的含义是（）。
13Emmy Statuette depicts a winged woman holding an atom
14A vacancy, caused by an atom missing from a lattice site, is a type of（）defects
15In hydrogen atom the angular momentum of the electron in the lowest energy state（）
16The average value of 1/r for a 1s electron in the hydrogen atom is（）
17According to structure of atom electron should fall in（）？
18The energy of a hydrogen atom in the first excited state is（）
19The nitrogen atom in the compound below has a positive charge:
20When drawing each carbon atom in a zigzag, try to draw all of the bondsas far apart as possible:
21For an 80-MeV α particle scattering from a gold atom（Z = 79 ） of radius 0135 nm， the largest scattering angle， θ is ？（）
22According to Bohr model of hydrogen atom， the radius of stationary obit characterized by the principal quantum number n is proportional（）
23For a hydrogen atom in the 6f state， the minimum angle between the orbital angular momentum vector and the z axis is（）
24An atom with the states 2G9/2 and 2H11/2 is placed in a weak magnetic fieldHow many transitions can be observed？（）
25The number of values allowed to total angular momentum j in Helium atom for a given non-zero l are（）
26The ratio of the speed of the electron in the ground state of hydrogen atom to the speed of light is（）
27If the electron in hydrogen atom jumps from the third orbit to second orbit， the wavelength of th emitted radiation is given by（）
28When the methyl group and H atom are located on opposite sides of the double bond, the polymer is a cis-isomer
29Atom在古希腊语中指的是下面哪一项？（）
30下列说法错误的是（）。Aatom的古希腊意思是不可分
31古希腊文"atom"的含义是什么？（）
32The 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（）。
33A 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？（）
34Liquid 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（）。
35How 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？（）