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What is the Periodic Table Showing? Periodicity

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. The database holds information on periodic tables, the discovery of the elements, the elucidation of atomic weights and the discovery of atomic structure (and much, much more).

   Use the drop menus or search box (below) to Select or Search the 1400 entries in the database: 

  Or, Search by Text String:       
Year:  1984 PT id = 1258, Type = formulation

Cherkesov: Two Periodic Tables

Cherkesov AI 1984, Ionization energy of 1-6 p-electrons and formation enthalpies of lutetium and lawrencium halides. Position of these elements in Periodic system, Radiokhimiya, vol. 26, no. 1, p. 53?60 (in Russian), https://inis.iaea.org/search/search.aspx?orig_q=RN:16012913

René Vernon writes:

"Two Russian offerings, the first is Mendeleev style, including He over Be and the integration of the Ln and An into the main body of the table.

"The second is the first time I have seen a genuine right step table, albeit at the expense of the numbers going backwards, and the non-intuitive group numbering scheme. Bonus marks for out-of-the box thinking."



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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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