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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.

Use the drop menus below to search & select from the more than 1300 Period Tables in the database: 

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Year:  1944 PT id = 875, Type = element

Discovery of Americium

Am

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.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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