课程名称︰普通化学丙 课程性质︰必修 课程教师︰周必泰 开课学院：医学院 开课系所︰医学系 考试日期（年月日）︰991112 考试时限（分钟）：110分 是否需发放奖励金：是~谢谢 普化丙 General Chemistry (Total Score 180) 1.(a)Please write the fomula and full name of atom 锰、铜、硒、氩、砷、锗(12) (b)Write down the formula and full name of atom in the family 2A of alkaline earth metal(13) Example: 氧 Answer: O, oxygen 2.Give three experimental result at the end of 19th (or beginning of 20th) century, which cannot be explained by the classical mechanics(10) 3.Define Boson and Fermions(5). Which one, Boson or Fermions, that electron and photon, respectively, belong to?(5) Using the concept of boson fermions to explain Pauli Exclusion Principle(5) and Bose-Einstein Condensation(5) 4.What is angular momentum quantum number of photon?(5) In hydrogen atom, could you use light to excite the electron from 1s orbital to 2s, or from 1s orbital to 2p orbital? Explain(5) Challenging question: Then, in moleculule, could you use light to excite the electron from pi orbital to anti-bonding pi-star orbital?(5) 5.(a)Write down two required conditions for achieving the quantized (discrete) energy for the motion of particle.(5) (b)In three dimensional wave motion where potential energy is assumed to be constant(=V), write down the corresponding Schrodinger equation for a particle with mass m, and also define the Hamiltonian(10) 6.Briefly explain self-consistent field (SCF) method for obstaning the orbitals of a polyelectronic atom(10) 7.(a)For the A4 family,CO2 gas is prevailing species on the earth, however, SiO2 gas is rarely observed. Explain.(5) (b)Similarly, one can easily find silica(矽土, the network of SiO2 (实验式)) on the earth, however, pure Si (silicon) semiconductor is not very popular. Explain(5) 8.Experimantally, the electron density around C-O bond un CO2 is cylindrically symmetric. Therefore, the electron density is homogeneous all around the O-C-O molecular axis. Using this experimental evidence and CO2 as a model, could you show one of the drawbacks(缺点) of LE model?(10) 9.Given the following general bond-length information N-N 1.67A N=O 1.15A N=N 1.20A N-O 1.47A N(三键)N 1.10A The obsevation that the N-N bond length in N2O is 1.12A and that the N-O bond length is 1.19A. Write down two possible Lewis structure of N2O and their formal charge.(10) 10.OCN- and CNO- are isomers. Write down the most stable Lewis structure for OCN- and CNO-(5) Determine and explain which one (OCN- or CNO-) is more stable form(5). 11.(a)Explain the difference between electronegativity and electron affinity(5) (b)Explain the rather small dipole moment for CO based on electron negativity and formal charge or whatever you think to be resonable(5) 12.Write down the molecular orbitals (MOs) of N2 and O2(5). Explain why the pi-2p and sigma-2p orbital energies are inverted from N2 to O2(5) Based on diamagnetism or paramagnetism of O2, explain why O2 is key element in sustaining our lives(我上课有解释，当然，您也可以用任何您能够想到到的合理 解释) (5). Arrange the bond distance of O2,O2-,O2+ by increasing trend(由 小而大) (5) 13.Draw the Lewis structures and geometry for the following molecules: a.XeF2 b.I3- and c. KrF4(5). What type of hybridization orbital for Xe in XeF2, center I in I3- and Kr in KrF4(5.) The formal charge of each atom for XeF2, I3- and KrF4(5). --

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