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.
Piazzalunga's Circular Periodic Table
"My name is Marco Piazzalunga, I'm from Bergamo, Italy and i'm 12 years old. I am very interested about chemistry and about your website dedicated to the periodic tables of elements. I've made one graphic version of the periodic table based on a "round" model and i would like to know your opinion about it. I'm sending you the file attached. I hope you enjoy it":
© Mark R. Leach 1999-
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counter started in 2011