E1PracticeProblems-08

E1PracticeProblems-08 - 1 A few more practice questions for...

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1 A few more practice questions for Exam 1: For more example questions, see two supplemental problems and practice quizzes. 1. Rank (1-5) the following orbitals in terms of relative ability to shield outer electrons from nuclear charge. 3d 2s 3s 3p 1s Rank (1-5) ___ ___ ___ ___ ___ 2. The valence electron configuration for chromium is 4s 1 3d 5 instead of 4s 2 3d 4 . Circle the electron configuration that would be favored on the basis of Exchange energy ( e ) 4s 1 3d 5 4s 2 3d 4 explain: Coulombic energy ( c ) 4s 1 3d 5 4s 2 3d 4 explain: 3. Briefly explain the following: (a) The reaction to add an electron (electron affinity) to carbon is more favorable than phosphorus which is more favorable than nitrogen. That is, the relative values of the electron affinities are C < P < N. (b) Galium is smaller than Aluminum. 4. (a) (i) Give an equation that defines the second ionization energy for any element E AND indicate the group for which the second ionization energies are largest. Explain your choice.
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This note was uploaded on 03/28/2008 for the course CHEM 251 taught by Professor Schauer during the Spring '08 term at UNC.

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E1PracticeProblems-08 - 1 A few more practice questions for...

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