Periodic Table |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
| 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 hold information on periodic tables, the discovery of the elements and elucidation of atomic weights (and more).
| Year: 1909 | PT id = 1032, Type = formulation |
Chemical News' Periodic Arrangement of the Elements
From Chemical News and Journal of Industrial Science, December 1909, a Periodic Arrangement of the Elements.
This formulation shows an element Np (mass 100 – Ogawa's nipponium), between Mo and Ru, a hypothesised element was later found to be the radioacive element technecium, discovered in 1937.
The formulation also has the Inactive Neutral Gases – the noble gases: St, RaEm, Z1 & Z2.

Many thanks to Sam Kidd for the tip!
![]() |
![]() |
![]() |
| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
Queries, Suggestions, Bugs, Errors, Typos...
If you have any:
Queries
Comments
Suggestions
Suggestions for links
Bug, typo or grammatical error reports about this page,please contact Mark R. Leach, the author, using mark@meta-synthesis.com
This free, open access web book is an ongoing project and your input is appreciated.






