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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 1300 Period Tables in the database: 

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Periodic Tables from the year 1878:

1878   Discovery of Ytterbium
1878   Waechter's Numerical Regularities


Year:  1878 PT id = 850

Discovery of Ytterbium

Yb

Ytterbium, atomic number 70, has a mass of 173.054 au.

Ytterbium was first observed or predicted in 1878 by J.C.G. de Marignac and first isolated in 1906 by C. A. von Welsbach.

Chronology of chemically the splitting of yttria (mixed oxides) into the pure rare-earth metals:

From: CRC Handbook on the Physics and Chemistry of Rare Earths, Chapter 248. Accommodation of the Rare Earths in the Periodic Table: A Historical Analysis
by Pieter Thyssen and Koen Binnemans (ISBN: 978-0-444-53590-0)

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Year:  1878 PT id = 1137

Waechter's Numerical Regularities

From page 136 of The Development of the Periodic Law by Venable, Francis Preston (1856-1934), Easton, Pa. Chemical Pub. Co (1896). The full text (scanned) is available from archive.org.

Venable writes:


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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