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: 1893 | PT id = 1402, Type = formulation weight |
Deeley's New Diagram and Periodic Table of The Elements
R. M. Deeley's 1893 publication, A new diagram and periodic table of the elements, was published in the Journal of the Chemical Society, Transactions (Vol. 63, pp. 852–867).
Key Features of Deeley's 1893 Periodic Table:
- Structure: Deeley proposed a table consisting of nine columns (or groups).
- Arrangement: The table sought to arrange the elements more in accordance with their physical and chemical properties than previous attempts.
- Design Specifics: The Lithium (Li) and Sodium (Na) periods were read from right to left.
- Diagrammatic Representation: The paper included a diagram plotting atomic weights against "atomic volumes" (or other physical properties) to show the periodicity of the elements.
- Series and Curves: Deeley suggested that the elements lie along a curve (similar to those produced by Lothar Meyer) and suggested that there are several lines for the same series with fixed inclinations to one another.
This work aimed to address some of the irregularities found in earlier periodic classifications, particularly regarding the properties of elements with lower atomic weights, by visualizing the periodicity through a specific diagrammatic layout.



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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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