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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:  2003 PT id = 343

Proper Place for Hydrogen in the Periodic Table

The Proper Place for Hydrogen in the Periodic Table, a paper by Marshall W. Cronyn of the Department of Chemistry, Reed College, Portlland.

Cronin writes in the Journal of Chemical Education Vol. 80, 94 -951: "After more than 130 years of construction, the place of hydrogen in the periodic table is still the subject of doubt, con- fusion, and inadequate explanation that appears to be little more than numerology..." and comes to the conclusion that hydrogen should be positioned above carbon:

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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