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 Manganese
Manganese, atomic number 25, has a mass of 54.938 au.
Manganese was first observed or predicted in 1774 by W. Scheele and first isolated in 1774 by G. Gahn.
© Mark R. Leach 1999-
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