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Unformatted text preview: Chem 113 Exam III 2005 SHOW ALL WORK Name (PRINT) _________________ 1 1. (11 pts) (i) Give the ground state electron configurations, using orbital notation and noble gas abbreviations (e.g., Li He] 2s 1 ), for the following species in the gas phase. (a) Ti 3+ ______________________________________________ (b) U 6+ ______________________________________________ (c) Fe 3+ _______________________________________________ (d) Au 1- _______________________________________________ (ii) How many unpaired electrons in one ion of: (a) Ti 3+ ______ (b) U 6+ ______ (c) Fe 3+ ______ (d) Au 1- ______ (iii) Which of the following species are isoelectronic: ____________________________________ N + Si 2+ Ne C Be 2+ B- 2. (7 pts) The following questions relate to periodic trends. (a) Which has the larger atomic radius, Mg, Sr or Rb __________ (b) Which has the smaller ionic radius, Cr 2+ , Mn 2+ or Mn 3+ __________ (c) Which has the larger ionic radius, PO 4 3- , SeO 4 2- or SO 4 2- ___________ (d) Which has the larger 2 nd Ionization Energy, Na, K or Rb __________ (e) Which has the smaller electronegativity, N, O, C or H __________ (f) Which element has a basic oxide, S, Al, C or Cl __________ (e) Which has the greater electron affinity, O or S __________ 3. (3 pts) (a) Draw a 3d xz orbital centered on the Fe atom below. (b) Label the Cartesian coordinates. (c) Give the sign (+ or -) of the wave function in the different parts of the orbital. Chem 113 Exam III...
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