Week 7 Practice Problems

Week 7 Practice Problems - CHEMISTRY 201X Practice...

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CHEMISTRY 201X October 1-5, 2007 Practice Problems (57) Which of the following combinations of quantum numbers are allowed for an electron in a one-electron atom? Which are not? (a) n = 2, l = 2, m = 1, m s = 1/2 (b) n = 3, l = 1, m = 0, m s = 1/2 (c) n = 5, l = 1, m = 2, m s = 1/2 (d) n = 4, l = 1, m = 0, m s = 1/2 (e) n = 3, l = 2, m = 1, m s = 0 (f) n = 2, l = 0, m = 1, m s = 1/2 (g) n = 7, l = 2, m = 2, m s = 1/2 (h) n = 3, l = 3, m = 0, m s = 1/2 (58) Write down the ground state electronic configurations for (a) Elements: C, Se, Fe, P, Tc, Ho; (b) Ions: Be + , C , Ne 2+ , Mg + , P 2+ , As + , Cl , I For each of these, identify the number of unpaired electrons. (59) Identify the atom or ion corresponding to each of the following descriptions: (a) an atom with ground state electron configuration [Xe](4 f ) 14 (5 d ) 6 (6 s ) 2 ; (b) an ion with charge 1 and ground state electron configuration [He](2 s ) 2 (2 p ) 6 ; (c) anion with charge +5 and ground state electron configuration [Kr](4
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Week 7 Practice Problems - CHEMISTRY 201X Practice...

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