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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > January  >
In the Classroom
The Mendeleev-Seaborg Periodic Table: Through Z = 1138 and Beyond
Paul J. Karol
Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213
Cover
January 2002
Vol. 79 No. 1
p. 60
Abstract
Since the mid-18th century, a new element has been discovered on the average of every two-and-a-half years. Hypothetically extending the periodic table beyond its current seventh row is discussed from several perspectives. For heavier elements, relativistic effects confound anticipated electron configurations. Nevertheless, it is suggested that the shell-partitioned display format (spdf) following Mendeleev and Seaborg be continued. Second, the tendency of higher atomic number elements to not survive long enough to be meaningful is addressed with the liquid drop model, including simplified discussions of binding energy and fissionability that for simplicity's sake neglect shell effects. The model provocatively suggests that astronomically large "nuclei" would be stable.
More Information
*  Citation
 Karol, Paul J. J. Chem. Educ. 2002 79 60.
*  Keywords
 Atomic Properties / Structure; General Chemistry; Inorganic Chemistry; Nuclear / Radiochemistry; Periodicity / Periodic Table
*  History
 Created:
Last Updated:		 December 3, 2001
March 16, 2005
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