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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.

Use the drop menus below to search & select from the more than 1300 Period Tables in the database: 

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Periodic Tables from the year 1984:

1984   Planiverse Periodic Table
1984   Discovery of Hassium
1984   Arabic Periodic Tables
1984   Cherkesov: Two Periodic Tables

Year:  1984 PT id = 29

Planiverse Periodic Table

The Planiverse is set in a 2-D universe that somehow enters into resonance with ours, enabling a computing professor (which Dewdney is) and his class to follow the adventures and scientific education of the hero Yendred (Dewdney backwards).

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Year:  1984 PT id = 888

Discovery of Hassium


Hassium, atomic number 108, has a mass of 270 au.

Synthetic radioactive element.

Hassium was first observed in 1984 by G. Münzenberg, P. Armbruster et al.

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Year:  1984 PT id = 924

Arabic Periodic Tables

From Arabic introductory text published by the Royal Scientific Society, Amman, Jordan, 1984. Jeries A. Rihani, who provided the two images, writes:

"The first image shows a periodic table similar to that of the Janet left-step periodic table, but in an upside-down flipped format.The second image displays the comparative energy levels of orbitals of atoms of many electrons."

Thanks to Jeries A. Rihani for the tip! 

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Year:  1984 PT id = 1258

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),

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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