Periodic Table |
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| What is the Periodic Table Showing? | Periodicity |
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. The database holds information on periodic tables, the discovery of the elements, the elucidation of atomic weights and the discovery of atomic structure (and much, much more).
Periodic Tables from the year 1906 :
| 1906 | Mendeleev's 1906 Periodic Table |
| 1906 | Lutetium, Discovery of |
| Year: 1906 | PT id = 464, Type = formulation |
Mendeleev's 1906 Periodic Table
Mendeleev's periodic table of 1906, the last drawn up by Mendeleev himself, and published in the 8th edition of his textbook, Principles of Chemistry. Mendeleev died in 1907.
Mendeleev DI, Osnovy khimii (Principles of Chemistry), 8th edition, 1906, MP Frolova, Saint Petersburg.
- H retains the position of 1871
- The triad of Cu, Ag, Au is still duplicated.
- The noble gases are Group O
- This arrangement predates the concepts of atomic number and electron configuration
- Coronium is shown with a dash

| Year: 1906 | PT id = 851, Type = element |
Discovery of Lutetium
Lu
Lutetium, atomic number 71, has a mass of 174.967 au.
Lutetium was first isolated in 1906 by C. A. von Welsbach and G. Urbain.
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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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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