课程名称︰普通化学丙 课程性质︰必带 课程教师︰刘铭璋 开课学院：理学院 开课系所︰化学系 考试日期（年月日）︰2013/10/16 考试时限（分钟）：120分钟 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : (附注：本次考试范围为课本Chemistry: An Atoms First Approach的Chapter Review~Chapter 4.6) 1.Write the symbols for these numbers: (a)10^-9, (b)10^-6, (c)10^3, (d)10^9. (4%) 2.Perform the following mathematical operations, and express the result to the correct number of significant figures. (4%) (a) (4.02*10^-12 + 3.713*10^-11)/(6.1*10^12+4.2*10^11) (b) (1.0028+0.221+0.10337)/3 (3 is exact) 3.Name the following compounds: (a)Mg(NO3)2 (b)FeCl3 (c)As2O5 (d)HBr (acid) (e)HClO2 (f)Sn(OH)4 (12%) 4.Write the chemical formulas for the following compounds: (a)mercury(I) iodide, (b)ammonium hydrogen sulfate, (c)sodium oxide, (d)hydrosulfuric acid. (8%) 5.Does a photon of visible light (λ≒ 400 to 700 nm) have sufficient energy to excite an electron in a hydrogen atom from the n=1 to the n=5 energy state? (6%) E=-2.178*10^-18 J (Z^2/n^2), h=6.6261*10^-34 Js, c=2.9979*10^8 m/s 6.We cab represent both probability and radial probability verys distance from the nucleus for a hydrogen 1s orbital as depicted below. What does each graph tell us about the electron in a hydrogen 4s orbital? (Hint: where you can find the electron.) (8%) (图：http://i.imgur.com/zusbWce.png) 7.Explain shielding and penetrating effects by using the Na atom (Z=11) as an example. Draw the relative orbital energy levels of polyelectronic atoms. Also explain how the following radial probability distributions support your answer. (9%) (图：http://i.imgur.com/kYqJ5Ax.png) 8.(a)Draw a rough sketch of a periodic table. Indicate where metals, nonmetals, and metalloids are located. (b)Give the group names of 2A, 7A and 8A. (c)What is Moseley's contribution to the modern periodic table? (d)Indicate the positions of Si(Z=14), Cu(Z=29) and Bi(Z=83). (8%) 9.Give the electron configuration for each of the following elements. (a)Si(Z=14), (b)Cu(Z=29), (c)Bi(Z=83). How many unpaired electrons are present in each element? (9%) 10.Consider the following ionization energies for aluminum: (6%) Al(g)→Al+ (g) + e- I1=580 kJ/mol Al+(g)→Al2+ (g) + e- I2=1815 kJ/mol Al2+(g)→Al3+ (g) + e- I3=2740 kJ/mol Al3+(g)→Al4+ (g) + e- I4=11600 kJ/mol (a)Account for the trend in the values of the ionization energies. (b)Explain the large increase between I3 and I4. 11.(a)Define electronegativity and electron affinity. Eplain the difference between electronegativity and electron affinity. (b)Describe in general how the electronegativities of the elements change according to position in the periodic table. (8%) 12.For each of the following groups, place the atoms and/or ions in order of decreasing size. (a)Cu, Cu+, Cu2+ (b)Te2-, I-, Cs+, Ba2+ (c)O2-, S2-, Se2-, Te2- (9%) 13.Use the following data for magnesium fluoride to estimate ΔE for the reaction: Mg(s) + F2(g) → MgF2(s) ΔE=? (5%) Lattice energy -2913 kJ/mol First ionization energy of Mg 735 kJ/mol Second ionization energy of Mg 1445 kJ/mol Electron affinity of F -328 kJ/mol Bond energy of F2 154 kJ/mol Energy of sublimation for Mg 150.kJ/mol 14. Which of the following sets of quantum numbers are not allowed in the hydrogen atom? For the sets of quantum numbers that are incorrect, state what is wrong in each set. (4%) (a)n=3, l=2, ml=2 (b)n=4, l=3, ml=4 (c)n=0, l=0, ml=0 (d)n=2, l=-1, ml=1 (附注：l为角量子数，ml为磁量子数) --

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