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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: 

  Text Search:       


Periodic Tables from the year 1844:

1844   Discovery of Ruthenium


Year:  1844 PT id = 824

Discovery of Ruthenium

Ru

Ruthenium, atomic number 44, has a mass of 101.07 au.

Ruthenium was first isolated in 1844 by K. Claus.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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