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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.

Use the drop menus below to search & select from the more than 1100 Period Tables in the database:

  Text Search:       

The 10 Periodic Tables most recently added to the database:

2021   Largest Periodic Table in Eurasia Created in Dubna
1916   Sommerfield's Periodic Table
2021   Mendeleyev Revisited
2021   Term & Spin State Periodic Table
1932   Bejerrum's Periodic Table
2021   Vernon's Eight-Fold Way Periodic Table
2006   Nandor's Exhaustive Lists of Chemical Words
2021   The Periodic Table: Is it Perfect, is it Fractured or is it Broken?
2021   World's Largest Periodic Table Created on ECU's Science Building
2021   USA as Periodic Table Infographic


Largest Periodic Table in Eurasia Created in Dubna

From The Times of India:

"The largest [PT] in Eurasia, the Periodic Table of Mendeleev opened in Dubna near Moscow. The event is timed to coincide with the 65th anniversary of the Joint Institute for Nuclear Research located here and the city itself. It is noteworthy that it is at JINR, in the Laboratory of Nuclear Reactions. G N Flyorov under the guidance of Academician of the Russian Academy of Sciences Yuri Oganesyan, all known to date superheavy elements were obtained – from 113th to 118th (the latter is even named after the scientist – 'Oganeson Og'). Oganesyan is the second scientist in the world, after whom a new element of the Periodic Table was named during his lifetime (the first was the American scientist Glenn Theodore Seaborg)."

Thanks to Eric Scerri for the tip!

See the website and Eric's Twitter Feed.

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Sommerfield's Periodic Table

A periodic table by Arnold Sommerfield, as an updated construction by Marks & Marks (2021).

John Marks writes:

"The reconstruction of Sommerfeld 1916 is derived from my reading of Henry Browse's translation of the third German edition of his Atomstruktur und Spektrallinien (Methuen 1923). Sommerfeld found the explanation of the greater (d– and f–) and lesser (s– and p–) periods in the solution of Kepler's ellipses using Schwarzschild's relativistic correction, communicated to him from the battlefront of WW1. Sommerfeld considered helium "an exception" but this is only an appearance deriving from defining periods as terminated by inert gases. In fact, the first period begins with hydrogen so the markers of periods are analogues of hydrogen, viz. the halogens."

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Mendeleyev Revisited

An Open Access paper: Marks, E.G., Marks, J.A. Mendeleyev revisited. Found Chem 23, 215-223 (2021).

"Despite the periodic table having been discovered by chemists half a century before the discovery of electronic structure, modern designs are invariably based on physicists' definition of periods. This table is a chemists' table, reverting to the phenomenal periods that led to the table's discovery. In doing so, the position of hydrogen is clarified."

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Term & Spin State Periodic Table

A Tern & Spin State periodic table by Gnanamani Simiyon who writes:

"We tried to arrange the elements based on the ground state term and spin state. I attached picture of the periodic table drawn. For example, I notice that alkali metals and coinage metals grouped up indicating some relationship between the groups. Similarly with respect to alkaline Earth metals and Zinc group. We are unable to further understand other groupings based on the ground state term and spin state."

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Bejerrum's Periodic Table

Bjerrum N, Inorganic chemistry, trans. (1936) from the 3rd Danish edition (1932) by N Bjerrum and RP Bell, William Heinemann, London

René Vernon observes:

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Vernon's Eight-Fold Way Periodic Table

René Vernon suggests that the chemical elements can be grouped into eight classes: four metallic (Active, Transition, Post-Transition and Noble) and four non-metallic (Halogen, Biogen, Metalloid and Noble gas):

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Nandor's Exhaustive Lists of Chemical Words

From a really interesting PT website, Mark Nandor's Exhaustive Chemical Words:

So what, exactly, is a "chemical word"? It is an English word that can be spelt using element symbols as 'letters', [famously] for example: Beer (or BeEr):

Arches can be "spelt" in two ways:

ArCHeS   [Argon, Carbon, Helium, Sulfur]
ArCHEs   [Argon, Carbon, Hydrogen, Einsteinium]

On the other hand, there is no way at all to "spell" a work like pillar.

Mark Nandor provides several exhaustive lists:

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The Periodic Table: Is it Perfect, is it Fractured or is it Broken?

A video from Mark Leach, who writes:

The periodic table is an icon of science. Indeed, all chemical matter is made from periodic table stuff. The periodic table of 118 elements is often presented as being: (a) complete, (b) 'perfectly' described by the application of four quantum numbers with the application of some simple rules and (c) chemical structure & reactivity can be deduced from the periodicity of the Groups & Periods. However, the chemistry of the chemical elements is a little more involved than this. So, where & why does the predictability 'break'?

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World's Largest Periodic Table Created on ECU's Science Building


"The new science building at Edith Cowen University (ECU), Joondalup Campus in Perth stands out for its striking façade, which features the world's largest periodic table. The thoughtful design by Silver Thomas Hanley Architects responded to the brief to deliver a bold and sophisticated architectural statement in the urban setting. The façade featuring the periodic table celebrates the building's purpose as a centre of scientific research and learning. Based on the university vice chancellor Professor Steve Chapman's idea, the periodic table is an enormous 662 square metres, spanning the entire front façade of the building."

Thanks to Eric Scerri for the tip!

See the website and Eric's Twitter Feed.

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USA as Periodic Table Infographic

An periodic table inspired infographic of the USA (from CNN):

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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