06ch260ex2practice - CHEM 260. Practice exam 2. June 5,...

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CHEM 260. Practice exam 2. June 5, 2006 PRINT NAME_______________________ ________________________ TABLE I, USEFUL INFORMATION k B = Boltzmann's constant = 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 m/sec m e = the mass of the electron = 9.1 x 10 -31 kg a 0 = Bohr radius = 53 pm N a = Avogadro’s number = 6.022 × 10 23 molecules/mol 1amu = 1.67 × 10 -27 kg Question I (%) Multiple Choice. Circle the letter corresponding to the best answer to each of the following questions. 1. Of the following, the electromagnetic radiation with the least energy is: a. radio waves b. 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 d. 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 ψ 2 dV c. In 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 b. 2 c. 3 d. 4 e. 5 1
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5. The set of quantum numbers for an electron in an orbital that is not allowed is: a. n = 2, l = 1, m = 0, s = 1/2 b. n = 3, l = 2, m = 1, s = 1/2 c. n = 2, l = 2, m = 0, s = 1/2 d. n = 2, l = 0, m = 0, s = -1/2 e. n = 4, l = 2, m = 0, s = -1/2 6. According to the "aufbau" principle, the number of unpaired electrons in an atom of carbon, at. no. 6, is; a. 0 b. 1 c. 2 d. 3 e. 4 *5 . The scientist who invented molecular orbital theory and received an unshared Nobel Prize for his work was: a. Max Born b. Niels Bohr c. Robert Mullikan d. Linus Pauling e. G.N. Lewis *6 . The scientist who first discovered "the nature of the chemical bond", figured out the
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This test prep was uploaded on 04/09/2008 for the course CHEM 260/261 taught by Professor Davids.newman during the Spring '06 term at University of Michigan.

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06ch260ex2practice - CHEM 260. Practice exam 2. June 5,...

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