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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:  2004 PT id = 968, Type = data misc

Cognitive Classroom's Periodic Table of Atoms

From Cognitive Classroom, a Periodic Table of Atoms. Richard Lambrecht writes:

"We have developed a visual periodic table that groups by orbitals, making He no longer contentious. But by including an orbital cloud, we give the student a great offset to the Bohr model used to place each and every single electron in the periodic table."

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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