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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 1100 Period Tables in the database:

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Periodic Table formulations from the year 1919:

1919   Langmuir's Periodic Table
1919   Hackh's Classification of the Elements, Updated
1919   Hackh's Periodic Spiral
1919   Hackh's Periodic Chain
1919   Discovery of Rhenium


1919

Langmuir's Periodic Table

From Irving Langmuir's theory of the Arrangement of Electrons in Atoms, J.Am.Chem.Soc., 41, 868 (1919), Langmuir's 1919 periodic table formulation.

This formulation seems to be the basis of Seaborg's formulations of 1939, 1942 & 1945:

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1919

Hackh's Classification of the Elements, Updated

From a Scientific American in March 1919, an article by Ingo W. D. Hackh discussing the classification of the elements.

Shown is a periodic table slightly updated from a version from two years before, and referenced by Quam & Quam:

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

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1919

Hackh's Periodic Spiral

From a Scientific American in March 1919, an article by Ingo W. D. Hackh discussing the classification of the elements.

Included is a periodic spiral, developed from Hackh's 1914 version:

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

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1919

Hackh's Periodic Chain

From a Scientific American in March 1919, an article by Ingo W. D. Hackh discussing the classification of the elements.

Included is a periodic chain showing the redox states of the elements:

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

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1919

Discovery of Rhenium

Re

Rhenium, atomic number 75, has a mass of 186.207 au.

Rhenium was first observed or predicted in 1908 by M. Ogawa and first isolated in 1919 by M. Ogawa.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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