Periodic Table |
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| What is the Periodic Table Showing? | Periodicity |
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. The database holds information on periodic tables, the discovery of the elements, the elucidation of atomic weights and the discovery of atomic structure (and much, much more).
| Year: 2025 | PT id = 1333, Type = formulation data spiral |
Circular Dendrogram Showing Hierarchical Clustering of the Chemical Elements
From S. Consuegra-Jiménez, C. Tovio-Gracia and R. Vivas-Reyes, Unsupervised learning techniques for clustering analysis of physicochemical properties in the periodic table elements, Results in Chemistry (2024), https://doi.org/10.1016/ j.rechem.2025.102517
The authors write:
"[A] circular dendrogram showing hierarchical clustering of chemical elements based on their properties. Each point represents an element, and cluster centroids are indicated with black "X" symbols.
"Periodic table where elements are colored using the same cluster assignments shown in the PCA plot, enabling visual correspondence between spatial clustering and elemental positions in the table."
Thanks to Eric Scerri for the tip.
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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