midTerm09a - Past exams do not indicate the style of...

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FAMILY NAME: ___________________________________________ FIRST NAME: ______________________________________________ SIGNATURE: ____________________________STUDENT NUMBER: __________________ THE UNIVERSITY OF BRITISH COLUMBIA Chemistry 154 – Section 108 (MWF 8 - 9 AM) Midterm Exam – October 21, 2009 Time: 45 minutes This exam consists of 9 pages including this title page and the data sheets. Please check that you have a complete examination paper. ANSWER THE QUESTIONS ONLY ON THIS EXAMINATION PAPER The following are the rules governing formal examinations: 1. Each candidate must be prepared to produce, upon request, a Library/AMS card for identification; 2. Candidates are not permitted to ask questions of the invigilators, except in cases of supposed errors or ambiguities in examination questions; 3. No candidate shall be permitted to enter the examination room after the expiration of one-half hour from the scheduled starting time, or to leave during the first half hour of the examination; 4. Candidates suspected of any of the following, or similar, dishonest practices shall be immediately dismissed from the examination and shall be liable to disciplinary action; * Making use of writing any books, papers or memoranda, calculators, computers, sound or image players/recorders/transmitters (including telephones), or other memory aid devices, other than those authorized by the examiners; * Speaking or communicating with other candidates; * Purposely exposing written papers to the view of other candidates or imaging devices. The plea of accident or forgetfulness shall not be received; 5. SMOKING IS NOT PERMITTED DURING THE EXAMINATION. Part A ___________/10 Part B 1. ____________/2 2. ____________/10 3. ____________/10 4. ____________/6 Total _________/38 Closed book examination Only approved calculators may be used during this examination. Turn off all pagers and cellular telephones! . Print First Letter of Family Name in box. Past exams do not indicate the style of questions of future exams.
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Part A: Multiple Choice [10 marks - 1 mark each] Circle the best answer for each of the following questions. 1. Which of the following is NOT true of the Bohr theory of the atom? a) The Bohr theory quite accurately reproduces the spectrum of the hydrogen atom. b) The Bohr theory involves quantum numbers. c) The Bohr theory is useful for reproducing the emission spectra of small atoms such as He and Li. d) The orbiting electron in the ground state of a hydrogen atom maintains a constant distance from the nucleus. 2. The energy required to remove the electron from an H atom in its ground state is 2.18 x 10 -18 J. What is the energy necessary to remove the one electron from the Be 3+ ion in its ground state? a) 2.17 x 10 —18 J b) 8.68 x 10 —18 J c) 1.95 x 10 —17 J d) 3.49 x 10 —17 J 3. When high energy ultraviolet light falling on a metal surface causes electrons to be ejected, as the intensity of the light is increased a) the kinetic energy of the ejected electrons increases b) the kinetic energy of the ejected electrons decreases c) the number of ejected electrons increases d) the number of ejected electrons decreases 4. Which of the following transitions in the hydrogen spectrum will radiate the highest frequency?
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This note was uploaded on 10/02/2010 for the course CEHM chem 154 taught by Professor Alexyang during the Fall '09 term at UOIT.

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midTerm09a - Past exams do not indicate the style of...

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