Problem Set 1 chem173A 2009

Problem Set 1 chem173A 2009 - Problem Set 1 Chemistry...

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Problem Set 1 Chemistry 173a/268a Fall 2009 Due: Oct 16, 2009 1) (5 points) Balance the following nuclear equations: 226 88 Ra 4 2 He + + 1 0 n 142 56 Ba + 91 36 Kr + 3 1 0 n 40 19 K+ 0 -1 e 137 55 Cs + 0 -1 e U+ n 238 92 1 0 +2 n 1 0 2) (8 points) Draw the (a) radial wavefunction and the (b) radial distribution function for the 3s, 3p, and 3d orbitals. (c) List the number of radial nodes found for each orbital type. (d) Order the effective nuclear charge experienced by these orbitals from highest to lowest. 3) (12 points) Identify n and l for the orbitals shown below, given m l = 0: (N.B. this is a representation of the probability density with the brighter region representing a higher value.) a) b) c) d) e) f)
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4) (5 points) The actinide contraction refers to the gradual decrease in atomic and ionic radii across the 5f series. Consider the following data: element Ionic radius (pm) Atomic Radius (pm) Ac 126 190 Th 118 180 Pa 117 164 U 114 154 Np 115 155 Pu 112 - Am 111 - Cm 110 - a) In the examples above why is the ionic radius less than the atomic radius?
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This note was uploaded on 01/09/2011 for the course CHEM 173A taught by Professor Unknown during the Spring '08 term at UCSB.

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Problem Set 1 chem173A 2009 - Problem Set 1 Chemistry...

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