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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:       




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."

Click image or here to enlarge:

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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