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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).
The 10 most recent entries to the database:
| Year: 2026 | PT id = 1424, Type = formulation misc non-chem |
Rotteveel's Loop de Loop of the Elements
Harry Rotteveel writes:
"I am the author of a philosophical book entitled Songs from Beyond – The Loop de Loop of the Elements, which explores the periodic table in relation to creation and human evolution (see https://www.songsfrombeyond.com). The book approaches these themes partly through insights drawn from homeopathic provings of the respective elements."
| Year: 2026 | PT id = 1423, Type = formulation 3D spiral |
Vortex Based Periodic Table of The Elements
The Vortex Based Periodic Table of Elements: A full view of the Pairs and Squares of Leonid A. Levin (2025) by Rev Daniel Elis Axelrod.
Daniel writes:
"The layout takes the period pairs of Charles Janet's left-step table (1928). Each pair of periods forms one ring. The four rings sit one inside the other. A space divides the table in half. The first period of each ring fills the left half, and the second period mirrors it on the right. Each element faces a mirror partner across the space. Of the 60 mirror pairs, 59 share a group. Helium and beryllium are the exceptions.
"The rings hold 4, 16, 36 and 64 elements: the even numbers 2, 4, 6 and 8 raised to the 2nd power. Each ring is the shell size 2n^2 taken twice.
"Attached are images of the table as a PNG, an SVG and an animated SVG, plus an interactive HTML version. Pointing at an element lights up that element and its mirror partner. A short paper is included in the HTML and the animated SVG."
Read more at: https://archive.org/details/vortex-based-periodic-table-of-elements
| Year: 2026 | PT id = 1422, Type = formulation 3D spiral misc non-chem |
Vilijoen's Standard Periodic Table
SP. Vilijoen writes: "The electron Standard Periodic Table makes up one-third of the Atom Cube, which is only one of many instances of the Pattern Cube. Other instances of the Pattern Cube include the Gravity Cube, the Cell Cube (with its Geometric Genetic Code), and the Vacuum Cube. All these possible instances illustrate the Principle of Patterning of the Pattern Science."
| Year: 2022 | PT id = 1421, Type = formulation review |
Eric Scerri Lecture: A Brief History of The Periodic Table
A lecture given by Eric Scerri to the University of New Hampshire (1st March 2022).
| Year: 2026 | PT id = 1420, Type = formulation spiral |
The Periodicspiral.com Website
A very slick update to Jeff Moran's' Periodicspiral Website. Just click the link and scroll down the page and the usual [Seaborg] formulation of the periodic table morphs into the Moran Spiral. As Jeff says: There are lots of bells & whistles".
| Year: 2019 | PT id = 1419, Type = misc |
Places in The World from where Chemical Elements Take Their Name
From a Reddit post by MapPorn:
Thanks to Eric Scerri for the Tip!
| Year: 2026 | PT id = 1418, Type = formulation |
Mendeleyev Tree
The Mendeleyev Tree by John Marks.
John says: "Many folk say to me the properties of the elements grow out of the previous elements and that the PT grows like a plant.
To accommodate this (rather popular) perspective, I offer the Mendeleyev Tree (which is really is just an inverted Step Pyramid):"
| Year: 2026 | PT id = 1417, Type = misc |
UCL Group 18
Building a creative legacy: New installation celebrates scientific discovery at UCL (University College London). A new periodic table installation has been unveiled on Gordon Street in recognition of Sir William Ramsay, UCL’s first Nobel Laureate, and his discovery of the noble gases. 17 September 2026.
Thanks to Eric Scerri for the tip!
| Year: 2026 | PT id = 1416, Type = formulation data |
Characteristic Colour of the Elements: Absorption (Salts / Glass) and Emission (Flame / Spectrum)
The Characteristic Colour of the Elements: Absorption (Salts / Glass) and Emission (Flame / Spectrum) - Mario Rodríguez Peña Each cell shows a colour of absorption (glass/oxide/salt, label "A") or of emission (flame/spectrum, label "E").
The first image below uses Mario Rodríguez Peña's 2024 formulation.
Go to Mario Rodríguez Peña website to see the dynamic PTs.
| Year: 2026 | PT id = 1415, Type = formulation |
Osman's Developed Models of Periodic Table of Elements
Developed Models of Periodic Table of Elements Dr. Khalid Abdel Fattah M. Osman, Associate Professor at Merowe Institute of Technology Merowe University of Technology, Sudan.
My latest 2026 research in periodic table of elements, titled "Developed Models of Periodic Table of Elements", introduces an innovative mathematical simulation that addresses some of the long-standing structural challenges in the modern periodic law [1.3.1، 1.3.4].
Unlike traditional models, the model leverages parabolic properties to map atomic shells and subshells, simulating an electronic configuration based on symmetrical circular orbits with a two-electron capacity each. This mathematical symmetry results in a highly coherent Extended Periodic Table, which elegantly accommodates predicted super heavy elements (beyond element 118) and offers a potential resolution to the debate surrounding the end of the periodic table.
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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