The INTERNET Database of Periodic Tables
There are hundreds of periodic tables in web space, but there is only one comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Dr Mark R Leach.
Srivaths–Labarca Periodic Table
In the new Srivaths–Labarca arrangement, the three main criteria proposed for the position of hydrogen and helium are simultaneously taken into account. Consequently, hydrogen is in between alkali metals and halogens, whereas helium is midway between the noble gases family and the alkaline earth elements.
Eric Scerri has critiqued this paper and periodic table here.
© Mark R. Leach 1999-
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counter started in 2011