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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 1904:

1904   Benedicks' Periodic Table
1904   Mendeleev's 1904 Periodic Table
1904   Ramsay's Periodic Arrangement of The Elements

Year:  1904 PT id = 366

Benedicks' Periodic Table

Periodic Table of Benedicks (1904) with an intraperiodic accommodation of the rare earths. Reproduced from Benedicks, C., 1904. Z. Anorg. Chem. 39, 41:

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Year:  1904 PT id = 433

Mendeleev's 1904 Periodic Table

Mendeleev periodic table formulation from 1904.

This formulation was prepared to go with Mendeleev's article predicting that the ether (aether) would be found at the head of group zero in period zero. Also that dashes are left for six elements between H and He.

The predicted elements eka-boron (scandium), eka-aluminium (gallium) & eka-silicon (germanium) are present but the radioactive eka-manganese (technetium) is not. Also, the noble gas elements are on the left hand side of the formulation:

Thanks to Philip Stewart for the corrections and details.

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Year:  1904 PT id = 546

Ramsay's Periodic Arrangement of The Elements

From from Scientific American in 1904,, an article by Sir William Ramsay discussing the Periodic Arrangement of The Element:

Redrawn by Mark Leach in 2019:

Thanks to Eric Scerri for the tip!
See the website and Eric's Twitter Feed.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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