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The INTERNET Database of Periodic Tables

There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Mark R. Leach Ph.D.

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Nechaev's Truncated Cones

René Vernon (who found this formulation) writes:

This weird and wonderful table appears in Teleshov & Teleshova (2019, p. 230). It is attributed by them to Nechaev (1893) and is apparently discussed by Ipatiev (1904):

"... We would also like to mention one more version of the periodic table, namely the one offered by V. Ipatiev. Ipatiev's version was one of the first to have been applied in a school textbook, and is also concise and accompanied by a detailed methodological commentary. More specifically, Ipatiev is important in directing our attention to the fact that an essential feature common to all elements should be chosen if the elements are to be systematized. Furthermore, Ipatiev also offered another crucial insight in arguing that this selected feature must satisfy certain conditions, namely: 1) it must be measurable, 2) it must be common to all elements and 3) it must be paramount, i.e. that all the remaining properties of the elements must depend on it [Ipatiev]."

• The caption accompanying the table is: "Scanning of the projection of rotational bodies in the form of truncated cones as used in Nechaev's spatial construction of the periodic system, 1893."
• Looking at the table it seems to anticipate, after a fashion, the double periodicity noticed by later authors.
• Alternatively, if turned on its side, it would be just five columns wide.
• Between Ce (ignoring Di) and Yb, there are spaces for 12 missing elements, which is one too many.
• Pulling Yb back by one position would have done the trick.

References:

Ipat'ev, V. & Sapozhnikov, A. (1904). Kratkij kurs himii po programme voennyh uchilishh [A concise course in chemistry for military academies]. Sankt-Peterburg: tip. V. Demakova.

Nechaev N. P. (1893). Graficheskoe postroenie periodicheskoj sistemy jelementov Mendeleeva. Sposob Nechaeva [Graphic construction of Mendeleev's periodic system of elements. Nechaev's way]. Moskva: tip. Je. Lissnera i Ju. Romana

Teleshov S, Teleshova E.: The international year of the periodic table: An overview of events before and after the creation of the periodic table. In V Lamanauskas (ed.).: Science and technology Education: Challenges and possible solutions. Proceedings of the 3rd International Baltic Symposium on Science and Technology Education, BalticSTE2019, Šiauliai, 17-20 June, 2019. pp. 227-232, (2019)

© Mark R. Leach Ph.D. 1999 –

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