winter2009final

winter2009final - C hemistry 20A W inter 2009 F inal Exam,...

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First Name: Student ID #: Problems 1) 50 pts.: 2) 50 pts.: 3) 50 pts.: 4) 50 pts.: 5) 50 pts.: 6) 50 pts.: 7) 50 pts.: 8) 50 pts.: Total pts.: Chemistry 20A Winter 2009 Final Exam, March 19 Last Name: Section:
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1. The standard "explain this" problems. a. Draw the symmetric and asymmetric stretching vibrations for the water molecule. b. What does the M in MASER represent? c. Draw potential curves and explain the harmonic oscillator approximation for a real molecule. d. What does VSEPR mean? e. Can the electrons an ionic bond be delocalized with respect to the atomic positions? f. Explain acronyms HOMO and LUMO. ;}j~H (lScSY\ nu1r I c:. .. b) Iv1 ; cr-OLuo. V ~ c) '" /1 ,I .w. . : 'Re. NellI(" R = Re, 'i,he eff' L, b VI U t11 be ncI I efIJ 'fh ) '+he hatmoru ~ o'S~ I law afpYOX' md:b Ol\. of ~he po+en-bo1 1S close -to '+hG real mo\etl-lllLrpote.ntlClL dJ V~\U1~ She \ I (iec.ir(jr\. -raj r- ·R~pu.lsiorL e) tVo ~ fu e\ee-\-tM\S cUre \oclll'l :l,ed on'it\{ '((lest e\~e.tr-on~J().-b·ve atom In o.nloV\1 e bond. -t') 110(Y10 ~. l-hjiw+ OecLLpifd t\I1oleeuJar OV-b,1ai LlAMO:::; Lowest fJ.nocclLpi~d M 0 lecJ.,dar Or bi-Je.1-
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2. The one electron atom! a. After drawing the appropriate energy levels for an atom, please calculate photon wavelengths and show the transitions involving the following energy levels: 2s to 3p; 2p(m)=O) and 3s to 4p (m)=O). Assume your one electron atom is positronium (hydrogen with the proton replaced by a positron, which has the mass of an electron and the charge of a proton. Hint replace the electrons mass, mem/(me + m~, me is
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This note was uploaded on 02/19/2011 for the course CHEM 20 taught by Professor Baugh during the Fall '10 term at UCLA.

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winter2009final - C hemistry 20A W inter 2009 F inal Exam,...

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