Schwarz, Eugen

Detlef Schrbder Gisela Schtltz Helmut Schwarz Eugen Schwarz Heinz Siedentop Herrmann Stoll Gerhard Soff Gtlnther Wunner... 

ABSTRACT This article concerns various foundational aspects of the periodic system of the elements. These issues include the dual nature of the concept of an "element" to include element as a "basic substance" and as a "simple substance." We will discuss the question of whether there is an optimal form of the periodic table, including whether the left-step table fulfils this role. We will also discuss the derivation or explanation of the [n + , n] or Madelung rule for electron-shell filling and whether indeed it is important to attempt to derive this rule from first principles. In particular, we examine the views of two chemists, Henry Bent and Eugen Schwarz, who have independently addressed many of these issues. 2008 Wiley Periodicals, Inc. Int J Quantum Chem 109 959-971, 2009... 

I would like to thank Eugen Schwarz and Henry Bent for discussion over several years. 

I acknowledge many scholars of the periodic table from diverse fields, including Peter Atkins, Henry Bent, Bernadette Bensaude, Nathan Brooks, Edwin Constable, John Emsley, Michael Gordin, Ray Hefferlin, William Jensen, Herbert Kaesz, Masanori Kaji, Maurice Kibler, Bruce King, Mike Laing, Laurence Lavelle, Guillermo Restrepo, Dennis Rouvray, Oliver Sacks, Eugen Schwarz, Philip Stewart, Mark Winters and many others. 

After W.H.E. Schwarz et al., Bunsen-Maga-zin (1999) 10, 60. Portrait reproduced from a painting by Tatiana Livschitz, courtesy of Professor Eugen Schwarz. 

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