The INTERNET Database of Periodic Tables
There are hundreds of periodic tables in web space, but there is only one comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Dr Mark R Leach.
Crehore's Periodic System
[Part of] Crehore's periodic system, with the electronic configurations of the atoms, from Crehore, Gyroscopic Theory, p 323 (1915).
Crehore adopted Rydberg's ordinal number, implying the existance of two elements between hydrogen and helium.
Note the absence of groups VI and VII and that beryllium is shown as "Gl", glacinium.
© Mark R. Leach 1999-
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