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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 Tables from the year 1951:

1951   Longman's Mural from Festival of Britain
1951   Mellor's Periodic Series of the Elements
1951   Tomkeieff's Periodic Table Formulation Formula
1951   Friend's Updated Periodic Table
1951   Spedding's Rare Earths Periodic Table


Longman's Mural from Festival of Britain

Edgar Longman's mural from the 1951 Festival of Britain Science Exhibition, restored by Philip Stewart:

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Mellor's Periodic Series of the Elements

Mellor's periodic series of the elements lists the rare earths as a vertical column below Y in Group III. Element Z=61, is identified as Il, illinium.

The peculiarities of Ce, Eu, Tb and Yb are not evident. U is positioned below W emphasizing its 6+ oxidation state.

From Michael Laing's paper: A Revised Periodic Table with the Lanthanides Repositioned, Found. Chem. (2005) 7: 203-233

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Tomkeieff's Periodic Table Formulation Formula

A short letter to Nature in which Tomkeieff gives a formula to generate the periodic table:


Thanks to Eric Scerri for the tip!
See the website and Eric's Twitter Feed
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Friend's Updated Periodic Table

René Vernon writes:

"This 1951 table succeeds Friend’s table of 1926. Notice how Pu, Am, and Cm have been assigned to group VIII. The splitting of the Ln across two periods is bizarre."

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Spedding's Rare Earths Periodic Table

Ref: Spedding FH 1951 The Rare Earths, Scientific American, vol. 185, no. 5, pp. 26–31

Thanks to René for the tip!

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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