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: Dr Mark R Leach.
Use the buttons below to select from the 1000+ Periodic Tables in the database:
Discovery of Sodium
Sodium, atomic number 11, has a mass of 22.99 au.
Sodium is a Group 1 element, and these are often referred to as the "alkali metals".
Sodium was first isolated in 1807 by H. Davy.
© Mark R. Leach 1999-
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