Internet Database of Periodic Tables
There are thousands 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.
Use the buttons below to select from the 1000+ Periodic Tables in the database:
Discovery of Americium
Americium, atomic number 95, has a mass of 243 au.
Synthetic radioactive element. It is used in smoke detectors, and so – surprisingly – is present most houses and buildings.
Americium was first observed in 1944 by G. T. Seaborg, R. A. James, O. Morgan and A. Ghiorso.
© Mark R. Leach 1999-
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