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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 1801:

1801   Discovery of Niobium


Year:  1801 PT id = 821

Discovery of Niobium

Nb

Niobium, atomic number 41, has a mass of 92.906 au.

Niobium was first observed or predicted in 1801 by C. Hatchett and first isolated in 1864 by W. Blomstrand.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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