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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 holds information on periodic tables, the discovery of the elements, the elucidation of atomic weights and the discovery of atomic structure (and much, much more).

   Use the drop menus or search box (below) to search & select from the 1400 entries in the database: 

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Year:  2007 PT id = 1364, Type = formulation

Distribuzione Peridica Degli Elemnti

Distribuzione Peridica Degli Elemnti – Periodic Distribution of Elements – by Leonello Paoloni.

From La Chimica nella Scuola, Sept. 2007, pp 111.

"Fig. 2. The periodic distribution of elements correlates with the group distribution of atomic electrons. Groups are formed so that all elements of the same family are found in corresponding positions (for example, the halogens are always in the second-to-last position in a group of six elements)." (Google Translate)

Thanks to Eric Scerri for the tip!

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© Mark R. Leach Ph.D. 1999 –

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