课程名称︰普通化学乙上 课程性质︰系内必带 课程教师︰金必耀 开课学院：工学院 开课系所︰土木工程学系 考试日期（年月日）︰2010/1/15 考试时限（分钟）：110min 是否需发放奖励金：是，谢谢 （如未明确表示，则不予发放） 试题 : 1. (10%) Use the rules of quantum numbers to determine which of the following sets of numbers are not allowed. State why they violate the rules. (a) n=2, l=2, m=0 ;(b) n=0, l=0, m=0 ;(c) n=7, l=0, m=0 ;(d) n=3, l=1, m=-1. 2. (10%) Write the electron configuration for the following elements: (a) Ar, (b) Hg, (c) Sn, (d) Ce, (e) V. 3. (5%) For each of the following groups, which element should have the smallest first ionization energy? (a) K, Mg, Na, (b) N, O, S, (c) Al, Ar, Si. . 4. (5%) How do we explain the fact that the ionization energy of oxygen is less than that of nitrogen? 5. (5%) Rank the following in order of decreasing size. F-, Mg2+, Na+, Ne, O2-. 6. (10%) Both ionic sodium floride and polymeric Teflon have extended, repeated structure. Draw a picture of the two types of molecules and discuss the differences in being that are depicted by your pictures. 7 .(5%) Sketch a graph of the potential energy of two atoms as a funtion of the distance between them. On your graph, indicate how bond energy and bond distance are defined. 8. (5%) Draw the Lewis structure of two resonance forms for ozone, O3. What prediction can you make about the relative lengths of the O-O bonds? 9. (10%) Draw the Lewis structures for the following molecules: (a) XeF4, (b) I3-, (c) ClO3-, (d) IF3. 10.(10%) What type of hybridixation would you expect for the carbon atom in each of the following species? (a) CO, (b) CO2, (c) H2CO, (d) CH2F2. 11.(10%) Draw a molecule orbital energy level diagram for H2. Then explain in molecular orbital terms the change in H-H internuclear distance that occur as the molecular H2 is ionized first to H2+ and then to H2(2+). 12.(5%) State the postulates of the kinetic molecular theory of gases (gas kinetic theory). 13.(10%) Given these relationships for average kinetic energy, Ek=0.5m(u^2), and Ek=1.5RT/NA. where m is molecular mass, u is rms speed, R=8.314J/(mol K) is the gas constant, NA is Avogadro's constant, and T is absolute temperature, calculate the rms speed of helium in winter (0度C) and in summer (30度C). --

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