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 1902 :
| 1902 | Brauner's Table |
| 1902 | Erdmann's Spiral Table |
| 1902 | Blitz's Periodensystem der Elemente |
| 1902 | Actinium, Discovery of |
| Year: 1902 | PT id = 58, Type = formulation |
Brauner's Table

From Quam & Quam's 1934 review paper.pdf
| Year: 1902 | PT id = 71, Type = formulation spiral |
Erdmann's Spiral Table

From Quam & Quam's 1934 review paper.pdf
| Year: 1902 | PT id = 365, Type = formulation |
Blitz's Periodensystem der Elemente
Periodic Table of Biltz (1902) with an intraperiodic accommodation of the rare earths. Reproduced from Biltz, H., 1902. Ber. 35 (562), 4242:

| Year: 1902 | PT id = 869, Type = element |
Discovery of Actinium
Ac ![]()
Actinium, atomic number 89, has a mass of 227 au.
Radioactive element.
Actinium was first isolated in 1902 by F. O. Giesel.
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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