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What is the Periodic Table Showing? Periodicity

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. The database hold information on periodic tables, the discovery of the elements and elucidation of atomic weights (and more).

Use the drop menus or search box (below) to search & select from the more than 1350 Period Tables in the database: 

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Year:  1808 PT id = 800, Type = element

Discovery of Calcium

Ca

Calcium, atomic number 20, has a mass of 40.078 au.

Calcium is a Group 2 element, and these are called: "alkaline earth metals".

Calcium was first isolated in 1808 by H. Davy.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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