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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 1817:

1817   Discovery of Lithium
1817   Discovery of Selenium
1817   Discovery of Cadmium


Year:  1817 PT id = 783, Type = element

Discovery of Lithium

Li

Lithium, atomic number 3, has a mass of 6.968 au.

Lithium is a reactive metal, of low density: it is the least dense metal.

Lithium was first observed or predicted in 1817 by A. Arfwedson and first isolated in 1821 by W. T. Brande.

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Year:  1817 PT id = 814, Type = element

Discovery of Selenium

Se

Selenium, atomic number 34, has a mass of 78.971 au.

Selenium was first isolated in 1817 by J. Berzelius and G. Gahn.

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Year:  1817 PT id = 828, Type = element

Discovery of Cadmium

Cd

Cadmium, atomic number 48, has a mass of 112.414 au.

Cadmium was first isolated in 1817 by S. L Hermann, F. Stromeyer and J.C.H. Roloff.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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