課程名稱︰普通化學丙
課程性質︰系定必修
課程教師︰張大釗
開課學院：生農學院
開課系所︰獸醫+植微
考試日期（年月日）︰2010/11/17
考試時限（分鐘）：10:20~12:10 (110mins)
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.Writing formulas for the following compounds(6pts)
Ammonium sulfate:___________________,Silcon tetrachloride:_________________,
Dinitrogen tetroxide:_______________,Potassium chromate:___________________,
Nitrous acid:_______________________,Chromium acetate:_____________________
2.Name the following compounds(6pts)
Ca(OH)___________________,Li3N___________________,
Na2CO3___________________,NO_____________________,
KH2PO4___________________,CuI____________________
3.What did Balmer observe in the atomic spectrum of hydrogen atom? Brieflly
describe why it is important.(6pts)
4.Table 1 list the correlation between incident wavelength on a surface of Na
and emitted electrons of the voltage. What information can you obtain from
these data?
λ (A) 2650 3125 4047 4339 5461 (e:1.6×10^-19 C)
V (volts) 2.128 1.595 1.215 1.025 0.467 (12pts)
5.Explaim (a)the duality of light by de Broglie? (b) the uncertainty principle
by Heisenberg? (c)the exclusion principle by Pauli? (6pts)
6.What are the n, l, and ml quantum number corresponding to the 3s orbital?
List all the possible n, l, ml quantum number for the 5d orbital. (6pts)
7.What are the electron configurations of the electrons with atomic number of
19(左下小字)X and 35(左下小字)Y? Which one has larger atomic radius? Which
one has larger ionic size? Which one has high electronegativity? (10pts)
8.It takes 208.4 kJ of energy to remove one mole of electrons from the atoms
on the surface of rubidium metal is irradiated with 254nm light, what is the
maximum kinetic energy the released electrons can have? (6pts)
9.Draw the Lewis structure and describe the geometry by VSEPR for a)IF2, b)
ICl3, c)SF2O, d)SO4^2-, e)PCl5, f)SeCl6. Please show any significant
resonance structures, assign the hybridization of central atom and its
fotmula charges.(18pts)
10.Which one has a large diploe: NO2- and NO3-? Explain.(6pts)
11.Draw all resonance structures and select the moststable one for SCN-.
(please give your justification) (6pts)
12.Use the MO model to dram energy diagram and predict the magnetism and bond
order of a)NO, b)NO+, c)NO-. The energy levelof the σ(2p) is found to be
higher than that of the π(2p) for NO. (12pts)
13.Localized Electron Model (a)Draw the possible Lewis structure of C3H4. (b)
Which one is more stable? (c)Name one experimental measurement to
distinguish them. (d)Give the effective electron pairs for each carbon atom
based on VSEPR and hthe hybridization to describe its molecular structure.
(e)Are all four hydrogen atoms in the same plane? (Give your justification
for each answer) (18pts)
14.Molecular Orbital Model. Use MO-LCAO method to calculate resonance energy
and electron density of the ground state and first excited state of allene
(C3H4, CH2=C=CH2) by using variation method. Here we only consider four
π-electrons. H=?Hi and Ψ=ΠΦi, where Φi=?cij and assuming
<Ψij∣Hi∣Ψij>=α if j=j', <Ψij∣Hi∣Ψij>=β if j and j' are neighbor,
<Ψij∣Hi∣Ψij>=0 otherwise. Accordingly, we can get secullar equation as
ˊ α-E β 0 ˋ ˊ C1A ˋ
∣ β α-E β ∣ ∣ C1B ∣ =0
ˋ 0 β α-E ˊ ˋ C1C ˊ
(a)Calculate the resonance energy. (b)Derive energy diagram. (c)Draw energy
diagram. (d)Calculate electron density of the ground state and first
excited state of CA and CB in C3H4. (20pts)
15.Describe ehat are the advantage and disadvantage of LE model and MO model?
And what do you learn from the last two qusetion?(12pts)
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