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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

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2004

Material Type Periodic Table

All of the the main group elements are common laboratory reagents or chemical in bottles. They appear as metals, metalloid (semi-metals) and non-metals. Most of the non-metals are molecular materials while most of the metalloids have an extended network-covalent structure.

Elsewhere in the chemogenesis web book, material type is discussed in terms of the Laing Tetrahedron, an analysis that classifies binary materials in terms of four extreme types: metallic, ionic, molecular and network. However, none the chemical elements present as ionic materials, only as metals, molecular (van er Waals) and network materials:

The elements B, C, Si, P, S, Ge, As, Se, Sn, Sb and Te can form allotropes: pure elemental substances that can exist with different crystalline structures from the Wikipedia. Allotropes may be metallic, network or molecular.

By Mark Leach

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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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