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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > April  >
Research: Science and Education
The Role of Triads in the Evolution of the Periodic Table: Past and Present
Eric Scerri
Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095
Cover
April 2008
Vol. 85 No. 4
p. 585
Abstract
The purpose of this article is to propose a new design for the presentation of the periodic system of the elements. It is a system that highlights the fundamental importance of elements as basic substances rather than elements as simple substances, a distinction that is explained in the article. The proposed table is a variant of the Janet or left-step periodic table. Furthermore the fundamental nature of atomic number triads of elements is put to use in obtaining a new perfect triad by relocating hydrogen among the halogens to give the triad H, F, Cl. The relative virtues of this table, as compared with the medium-long form and the left-step table, are discussed.
More Information
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Citation
Scerri, Eric. J. Chem. Educ. 2008, 85, 585.
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Keywords
Graduate Education / Research; History / Philosophy; Inorganic Chemistry; Periodicity / Periodic Table; Quantum Chemistry; Textbooks / Reference Books; Theoretical Chemistry; Upper-Division Undergraduate
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History
Created:
Last Updated:
2/26/2008
2/29/2008
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