cem181f07e1 - Chemistry 181H Fall, 2oo7 EXAM I Thursday, 27...

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Unformatted text preview: Chemistry 181H Fall, 2oo7 EXAM I Thursday, 27 Sept 2oo7 WRITE your Name Student Number Recitation Time: Monday There are 7 questions on this exam, worth 15 points each. Write your answer, showing all work to each on each page. A list of potentially useful equations is on page 9. A periodic table is contained on page 10. # Score 1 /15 2 /15 3 /15 4 /15 5 /15 6 /15 7 /15 total /100 1 1. The element silver has two stable isotopes, one with 60 neutrons and the other has 62 neutrons. You will need information in the periodic table to answer the following two questions. (a) (5 points) Estimate the volume of the lighter silver nucleus in cubic angstroms (Hint: 1 m=10 10 ( A)). (b) (10 points) Calculate the relative abundances of the two isotopes of silver. 2 2. The following questions refer to the interaction potential between a nitrogen and an oxygen atom. Element N O Melting point 63.05 54.8 K First Ionization Potential 1400 1310 kJ/mol Pauling 3.0 3.4 Electron Affinity-7-141 kJ/mol Atomic Radii 74 66 pm (a) (5 points) In the space below make a careful sketch of the interac-...
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This note was uploaded on 07/25/2008 for the course CEM 181h taught by Professor Morrissey during the Fall '08 term at Michigan State University.

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cem181f07e1 - Chemistry 181H Fall, 2oo7 EXAM I Thursday, 27...

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