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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:  1789 PT id = 872, Type = element

Discovery of Uranium

U

Uranium, atomic number 92, has a mass of 238.029 au.

Radioactive element with a very long half-life.

Uranium was first observed or predicted in 1789 by H. Klaproth and first isolated in 1841 by E.-M. Péligot.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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