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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 1896:

1896   Richards' Classification of The Elements
1896   Ramsay's Elements Arranged in the Periodic System


1896

Richards' Classification of The Elements

This is how the periodic table looked in 1896 in an article by Theodore Richards the pioneer of atomic weight measurement.

Notice all those elements at the bottom that could not be classified, explicitly listed including He and Ar :

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

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1896

Ramsay's Elements Arranged in the Periodic System

From The Gases of the Atmosphere, The History of Their Discovery by William Ramsay (and from the Gutenberg Project.)

The author writes pp 220-221:

"In 1863 Mr. John Newlands pointed out in a letter to the Chemical News that if the elements be arranged in the order of their atomic weights in a tabular form, they fall naturally into such groups that elements similar to each other in chemical behaviour occur in the same columns. This idea was elaborated farther in 1869 by Professor Mendeléeff of St. Petersburg and by the late Professor Lothar Meyer, and the table may be made to assume the subjoined form (the atomic weights are given with only approximate accuracy):—"

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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