OWLV2 FOR OXTOBY/GILLIS/BUTLER'S PRINCI
8th Edition
ISBN: 9781305271579
Author: Butler
Publisher: IACCENGAGE
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Chapter 13, Problem 26P
Quartz,
even though the standard entropy change of the reactionis large and positive
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Technetium is the first element in the periodic chart that does not have any stable isotopes.
Technetium-99m is an especially interesting and valuable isotope as it emits a gamma ray with a half
life ideally suited for medical tests. It would seem that the decay of technetium should fit the
treatment above with the result In(c/c) = -kt. The table below includes data from the two sites:
http://dailymed.nlm.nih.gov/dailymed/druginfo.cfm?id=7130
http://wiki.medpedia.com/Clinical: Neutrospec_(Technetium_(99m Tc)_fanolesomab).
a.
b.
C.
Graph the fraction (c/c.) on the vertical axis versus the time on the horizontal axis. Also
graph In(c/c.) on the vertical axis versus time on the horizontal axis.
When half of the original amount of starting material has hours fraction remaining
disappeared, c/c = ½ and the equation In(c/c.) = -kt becomes
In(0.5) = -kt1/2 where t₁₂ is the half life (the time for half of the
material to decay away). Determine the slope of your In(c/c.) vs
t graph and…
Please correct answer and don't use hand rating
1.
a) Assuming that an atom of arsenic has hydrogen-like atomic orbitals, sketch the radial
probability plots for 4p and 4d orbitals of S atom. Indicate angular and radial nodes in
these orbitals.
(4 points)
b) Calculate Zeff experienced by and electron in 4p AO's in a arsenic atom. Use Slater rules
that were discussed in lecture.
(3 points)
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