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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.

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Riesenfeld Periodic Table

From here, using Google Translate:

This table is from the book "Practical Inorganic Chemistry" Publisher EH Riesenfeld Labor, Barcelona (1950). It is a reprint of the second edition (1943) which in turn is a translation of a German edition, its seventh edition in 1928. This suggests that Riesenfeld is himself the author of it.

It is a pre-Seaborg table in the sense that the actinides are known throughout the period July. It also does not include the Tc since it was discovered in 1937. These facts support the dating of the table. But the most interesting thing about it is that to make the separation between subgroups and major groups Be cut after the first period and after the Al in the second. Which leaves isolated in group B without any element 2b below it:

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

© Mark R. Leach Ph.D. 1999 –

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