Chem 115 Final 06

Chem 115 Final 06 - 1 EXAM FORM D5 Name _ Section _ TA _...

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EXAM FORM D5 Name _________________________ Chemistry 115-T Section ____________ FINAL EXAM Total Points = 210 TA ___________________________ Monday, 3:20 PM December 11, 2006 THIS EXAM IS FOR STUDENTS WITH TUESDAY-THURSDAY 8:30 or 9:30 LECTURE. YOU SHOULD HAVE A TAN COMPUTER ANSWER SHEET! Directions: 1. Each student is responsible for following directions. Read this page carefully. 2. Write your name and other requested information on this page and on the separate answer sheet. 3. CODE your name on the answer sheet using an ordinary (#2) pencil. 4. CODE your correct 10-digit identification number (PUID) on the answer sheet. THIS IS VERY IMPORTANT! 5. CODE your section number on the answer sheet. Please use all four digits, 0101, 0102, 0201, etc. This is also very important! 6. 1CODE the test number or letter shown in the upper right-hand corner of this page onto the answer sheet in the block labeled “Test Form” under the Date line at the top right-hand side. This is Test Form D5. 7. Put all calculations on the examination pages. DO NOT PUT ANY EXTRA MARKS ON THE COMPUTER ANSWER SHEET! 8. This exam consists of 35 multiple-choice questions worth 6 points each. Choose the one best or correct answer for each question and write it both on your exam paper and on the computer answer sheet. The computer answer sheet is the only one that will be graded! 9. This exam consists of 11 pages plus Useful Information (2 pages), a Periodic Table, and 2 sheets of scratch paper. Please check to be sure that you have them all! AT the 1 END OF the EXAM 1) Please make sure that you have entered 35 answers on your scan sheet. 2) Make sure that you have entered your name, ID number, and lab section number (4 digits) on your scan sheet and Exam Form. 3) You MUST turn the scan sheet in to your TA before leaving the exam! 1
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Chem 115-T – Final Exam (Test D5) – 12/11/06 _____ 1. What is the half-life of an isotope if it decays to 12.5% of its radioactivity in 18 minutes? (a) 9 minutes (b) 8 minutes (c) 12 minutes (d) 6 minutes (e) 0.17 minutes Use the following information for questions 2 and 3: Element 118 was discovered in October, 2006. It has a half-life of several milliseconds and decays to element 116 in one step. _____ 2. The nucleus of element 118 most likely has the following composition: (a) 59 protons and 59 neutrons (b) 118 protons and 116 neutrons (c) 118 protons and 118 neutrons (d) 118 neutrons and 118 electrons (e) 118 protons and 175 neutrons _____ 3. The mode of decay for element 118 is: (a) β-decay (b) positron emission (c) electron capture (d) α-decay (e) ionization _____ 4. Alexander Litvinenko, a Russian dissident, was poisoned with polonium-210. The poison was ingested and it took weeks for him to die. The half-life of polonium-210 is 138 days, and the isotope decays through α-decay . The product of the decay is(are):
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Chem 115 Final 06 - 1 EXAM FORM D5 Name _ Section _ TA _...

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