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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 1909:

1909   Chemical News' Periodic Arrangement of the Elements
1909   Garrett's The Periodic Law


1909

Chemical News' Periodic Arrangement of the Elements

From Chemical News and Journal of Industrial Science, December 1909, a Periodic Arrangement of the Elements.

This formulation shows an element Np (mass 100 – Ogawa's nipponium), between Mo and Ru, a hypothesised element was later found to be the radioacive element technecium, discovered in 1937.

The formulation also has the Inactive Neutral Gases – the noble gases: St, RaEm, Z1 & Z2.

Many thanks to Sam Kidd for the tip!

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1909

Garrett's The Periodic Law

A book reviewing The Periodic Law by A.E. Garrett, pub. D. Appelton & Co (1909). This work shows the state of knowledge in the first decade of the 20th century.

René Vernon writes:

"On page 43 Garrett notes that, '[Thomas] Carnelley was the first English chemist to work out in detail the manner in which the properties of the elements are periodic functions of their atomic weights. His papers on this subject appeared in the Philosophical Magazine between the years 1879 and 1885.' "

Read more one Carnelley here.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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