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pre 1900 formulations
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2019 has been designated the International Year of the Periodic Table as it is the 150th Anniversary of the formulation of Mendeleev's Tabelle I

Internet Database of Periodic Tables

There are thousands 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.

Use the buttons below to select from the 1000+ Periodic Tables in the database:

 pre 1900 formulations  1900 to 1949 formulations  1950 to 1999 formulations  2000 to 2009 formulations    Spiral formulations  3 dimensional formulations
 Data mapping periodic tables  Miscellaneous periodic tables  Books and reviews  non-chemistry periodic tables      All periodic tables

Or, select:     Search by Year:      Text search:

1945

Segré Chart of Elements & Isotopes

The Segré chart of elements and isotopes arranges atomic nuclei by numbers or protons and numbers of neutrons and is a table of nuclides. There are various ways the axes can be arranged. From elsewhere in this chemogenesis web book:

And from Wikipedia:

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pre 1900 formulations 1900 to 1949 formulations 1950 to 1999 formulations 2000 to 2009 formulations Spiral formulations 3 dimensional formulations
Data mapping periodic tables Miscellaneous periodic tables Books and reviews non-chemistry periodic tables All periodic tables

Periodic Table, What is it showing?
Binary Compounds

© Mark R. Leach 1999-

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This free, open access web book is an ongoing project and your input is appreciated.