Exam 2 2006 - CHEM260 PRINT NAME Second hourly Exam first...

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/ CHEM260 Second hourly Exam June 5, 2006 PRINT NAME _ first last STUDENT ID # _ "There are therefore Agents in Nature able to make the Particles of Bodies stick together by very strong Attractions. And it is the Business of experimental Philosophy to find them out." Sir Isaac Newton (1705) "I can't believe that!" said Alice one can't believe impossible things." "I dare say you haven't had much practice said the Queen" "When I was your age I always did it for half an hour a day. Why sometimes I believed as many as six impossible things before breakfast" Lewis Carrroll "Through The Looking Glass" Questio Score n I II III IV V VI VII VIII IX Total "I believe the chemical bond is not so simple as some people seem to think" Robert S. Mulliken (1938) TABLE I USEFUL DATA R = 8.31 J/Kmol = 0.082 litatmlKmol One atm. = 760 mmHg = 1.01 x 10 5 Pa Boltzmann constant, k B = 1.38 X 10- 23 J/K h = Planck's constant = 6.6 x 10- 34 Jsec C = velocity of light = 3 x 10 8 m1sec me = the mass of the electron = 9.1 x 10- 31 kg m p = the mass of the proton = 1.67 x 10- 27 kg e" = 1.60 x 10- 19 coulombs lamu = 1.67 x 10- 27 kg 1
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Question I multiple choices (10%) Circle the letter corresponding to the best answer to each of the multiple choice questions. J. •. Of the following, the electromagnetic radiation with the least energy is: ( a. radio waves ..---if' gamma rays c. X-rays d. ultra violet light e. visible light 2. An atomic orbital whose azimuthal or orbital quantum number is 3 is: a. an s orbital b. a p orbital c. a d orbital t'cD an f orbital e. a g orbital 3. The Pauli exclusion principle states that: a. It is impossible to simultaneously measure a particle's position and momentum to arbitrary precision b. the probability of finding an electron in an atom is proportional to \jf2dV (~)ln an atom, no two electrons can have the same four quantum numbers d. light is absorbed or emitted discontinuously e. electrons will always enter orbitals in such a way that the atom's spin quantum number is maximized 4. The maximum number of electrons that any orbital can contain is: a. 1 Ii):' 2 c. 3 d.4 e. 5 5. The set of quantum numbers for an electron in an orbital that is not allowed is: a. n = 2, I = 1, m = 0, s = 1/2 b. n = 3, 1= 2, m = 1, S = 1/2 ~ n = 2, I = 2, m = 0, s == 1/2 d. n = 2, I = 0, m = 0, S == -1/2 e. n = 4, I = 2, m == 0, S == -1/2 2
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e.4 6. According to the "aufbau" principle. the number of unpaired electrons in an atom of carbon, at. no. 6, is; a.O b. 1 ,,-ZJ2 d. 3 7.. The scientist who invented molecular orbital theory and received an unshared Nobel
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This note was uploaded on 06/01/2008 for the course CHEM 260/261 taught by Professor Davids.newman during the Spring '06 term at University of Michigan.

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Exam 2 2006 - CHEM260 PRINT NAME Second hourly Exam first...

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