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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:       

Periodic Table formulations from the year 2020:

2020   Annotated Periodic Table
2020   What Is A Chemical Element?
2020   FReNeTic
2020   Nuclear Periodic Table
2020   Gierałtowski's Periodic Rotation Table
2020   Nawa Version of Maeno's Nuclear Periodic Table
2020   Vernon's Periodic Table showing the Idealized Solid-State Electron Configurations of the Elements
2020   Correlation of Electron Affinity (F) with Elemental Orbital Radii (rorb)
2020   Periodic Table Challenge
2020   Vernon's Constellation of Electronegativity
2020   Jodogne's Periodic Table of The Elements
2020   artlebedev's 100,000 Permutation Periodic Table of The Elements


Annotated Periodic Table

From René Vernon's paper, Vernon, R.E. Organising the metals and nonmetals. Found Chem (2020). (in the supplementary material).

Click image to enlarge.

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What Is A Chemical Element?

A Collection of Essays by Chemists, Philosophers, Historians, and Educators Edited by Eric Scerri and Elena Ghibaudi published by Oxford University Press

The concept of a chemical element is foundational within the field of chemistry, but there is wide disagreement over its definition. Even the International Union for Pure and Applied Chemistry (IUPAC) claims two distinct definitions: a species of atoms versus one which identifies chemical elements with the simple substances bearing their names. The double definition of elements proposed by the International Union for Pure and Applied Chemistry contrasts an abstract meaning and an operational one. Nevertheless, the philosophical aspects of this notion are not fully captured by the IUPAC definitions, despite the fact that they were crucial for the construction of the Periodic Table. Although rich scientific literature on the element and the periodic table exists as well as a recent growth in the philosophy of chemistry, scholars are still searching for a definitive answer to this important question: What is an element?

Eric Scerri and Elena Ghibaudi have teamed up to assemble a group of scholars to provide readers an overview of the current state of the debate on chemical elements from epistemological, historical, and educational perspectives. What Is A Chemical Element? fills a gap for the benefit of the whole chemistry community-experimental researchers, philosophers, chemistry educators, and anyone looking to learn more about the elements of the periodic table.

CHAPTER 1: The many questions raised by the dual concept of 'element' Eric R. Scerri
CHAPTER 2: From simple substance to chemical element Bernadette Bensaude-Vincent
CHAPTER 3: Dmitrii Mendeleev's concept of the chemical element prior to the Periodic Law Nathan M. Brooks
CHAPTER 4: Referring to chemical elements and compounds: Colourless airs in late eighteenth century chemical practice Geoffrey Blumenthal, James Ladyman, and Vanessa Seifert
CHAPTER 5: The Changing Relation Between Atomicity and Elementarity: From Lavoisier to Dalton Marina P. Banchetti-Robino
CHAPTER 6: Origins of the Ambiguity of the Current Definition of Chemical Element Joseph E. Earley
CHAPTER 7: The Existence of Elements, and the Elements of Existence Robin F. Hendry
CHAPTER 8: Kant, Cassirer, and the Idea of Chemical Element Farzad Mahootian
CHAPTER 9: The Operational Definition of the Elements: A Philosophical Reappraisal Joachim Schummer
CHAPTER 10: Substance and Function: The case of Chemical Elements Jean-Pierre Llored
CHAPTER 11: Making elements Klaus Ruthenberg
CHAPTER 12: A formal approach to the conceptual development of chemical element Guillermo Restrepo
CHAPTER 13: Chemical Elements and Chemical Substances: Rethinking Paneth's Distinction Sara N. Hjimans
CHAPTER 14: The dual conception of the chemical element: epistemic aspects and implications for chemical education Elena Ghibaudi, Alberto Regis, and Ezio Roletto
Appendix: Reference list on the philosophy of chemistry Index.

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FReNeTiC is the multi-Award winning 'Frenzied word game of the Elements' where players race against the clock to form as many words as possible using the Element Symbols of The Periodic Table.

In this fast and furious word game players score points equivalent to the atomic numbers of each tile used to create the word, for example Ba Na Na = Banana = 78 points.

The first player to score 1000 points wins!

Everyone plays all the time, quick set up and easy-to-follow rules with FRaNTiC FUN AcTiON! (And no, you don't need to know the Periodic Table or be a GeNiUS to play).

Thanks to Marcus for the tip!

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Nuclear Periodic Table

A nuclear periodic table by Kouichi Hagino & Yoshiteru Maeno from Kyoto University published in Foundations of Chemistry here & here (open access).

"Elements with proton magic-number nuclei are arranged on the right-most column, just like the noble-gas elements in the familiar atomic periodic table.

"The periodic properties of the nuclei, such as their stability and deformation from spherical shape, are illustrated in the table. Interestingly, there is a fortuitous resemblance in the alignments of the elements: a set of the elements with the magic number nuclei 50(Sn), 82(Pb) and Fl(114) also appears as the group 14 elements in the atomic periodic table. Thanks to this coincidence, there are similarities in the alignments beyond 41(Nb) (e.g., Nb-Ta-Db or La-Ac in the same columns) in both the nuclear and atomic periodic tables of the elements.

"Related documents can be found:

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Gierałtowski's Periodic Rotation Table

Sent by Tomasz Gierałtowski from Poland. There is no information, but Tomasz has provided construction diagrams for each period. Click the links to see these:

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Nawa Version of Maeno's Nuclear Periodic Table

Nagayasu Nawa - "A Japanese school teacher and periodic table designer" - has developed two versons of the Hagino-Maeno Nuclear Periodic Table.

Nawa writes:

"I have made two Nuclear PTs based on Hagino-Maeno (2020). I have tried to express the Nuclear PT visually by using symbols such as '〇','◇','☓' or small '〇' or '●' in a binary way so that people with colour blindness could understand it. And the other have been with the ' QUAD electronic data."

Click either of the images below to enlarge:

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Vernon's Periodic Table showing the Idealized Solid-State Electron Configurations of the Elements

René Vernon writes:

"I've attached a periodic table showing the solid-state electron configurations of the elements. Among other things, it provides a first order explanation as to why elements such as Ln (etc.) like the +3 oxidation state.

"The table includes two versions of the f-block, the first starting with La-Ac; the second with Ce-Th. The table with the first f-block version has 24 anomalies [with respect to Madelung's rule]; the table with the second f-block version has 10 anomalies.

"In the case of the Sc-Y-La-Ac form, I wonder if such a solid-state table is more relevant these days than a table based on gas phase configurations, which has about 20 anomalous configurations.

"Partly we use gas phase configurations since, as Eric Scerri mentioned to me elsewhere, configurations were first obtained (~100 years ago?) from spectroscopy, and this field primarily deals with gas phase atoms. That said, are gas phase configurations still so relevant these days – for this purpose – given the importance of solid-state physics?

"I've never been able to find a periodic table of solid-state electron configurations. Perhaps that has something to do with it? Then again, surely I'm not the first person to have drawn one of these?"

Click image below to enlarge:

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Correlation of Electron Affinity (F) with Elemental Orbital Radii (rorb)

From Jour. Fac. Sci., Hokkaido Univ., Ser. IV. vol. 22, no. 2, Aug., 1987, pp. 357-385, The Connection Between the Properties of Elements and Compounds; Mineralogical-Crystallochemical Classification of Elements by Alexander A. Godovikov & Yu Hariya and expanded by René Vernon who writes.

René Vernon writes:

I was delighted to read about two properties that account for nearly everything seen in the periodic table.

Two properties
While researching double periodicity, I happened upon an obscure article, which simply correlates electron affinity with orbital radius, and in so doing reproduces the broad contours of the periodic table. Having never thought much about the value or significance of EA, and its absence of easily discernible trends, I was suitably astonished. The authors left out the Ln and An and stopped at Bi. They were sitting on a gold mine but provided no further analysis.

I added the data up to Lr, updated the EA values, and have redrawn their graph. It is a thing of beauty and wonderment in its simplest sufficient complexity and its return on investment. I've appended 39 observations, covering all 103 elements.


So there it is, just two properties account for nearly everything.

Click images below to enlarge:

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Periodic Table Challenge

IUPAC have developed a Periodic Table Challenge. Answer PT questions at Beginner, Intermediate or Advanced level.

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Vernon's Constellation of Electronegativity

René Vernon has created a "Constellation of Electronegativity" by plotting Electronegativity against Elemental Orbital Radii (rorb)

Observations on the EN plot:

    1. The results are similar to the orbital radii x EA plot, although not quite as clear, including being more crowded
    2. Very good correspondence with natural categories
    3. Largely linear trends seen along groups 1-2, 17 and 15-18 (Ne-Rn)
    4. First row anomaly seen for He (or maybe not since it lines up with the rest of group 2)
    5. For group 13, the whole group is anomalous
    6. For group 14 , the whole group is anomalous no doubt due to the scandide contraction impacting Ge and the double whammy of the lanthanide and 5d contraction impacting Pb
    7. F and O are the most corrosive of the corrosive nonmetals
    8. The rest of the corrosive nonmetals (Cl, Br and I) are nicely aligned with F
    9. The intermediate nonmetals (IM) occupy a trapezium
    10. Iodine almost falls into the IM trapezium
    11. The metalloids occupy a diamond, along with Hg; Po is just inside; At a little outside
    12. Rn is metallic enough to show cationic behaviour and falls into the metalloid diamond
    13. Pd is located among the nonmetals
    14. The proximity of H to Pd is again (coincidentally?) curious given the latter's capacity to adsorb the former
    15. The post-transition metals occupy a narrow strip overlapping the base of the refractory metal parallelogram
    16. Curiously, Zn, Cd, and Hg (a bit stand-off-ish) are collocated with Be, and relatively distant from the PTM and the TM proper
    17. The ostensibly noble metals occupy an oval; curiously, W is found here; Ag is anomalous given its greater reactivity; Cu, as a coinage metal, is a little further away
    18. Au and Pt are nearest to the halogen line
    19. The ferromagnetic metals (Fe-Co-Ni) are colocated
    20. The refractory metals, Nb, Ta, Mo, W and Re are in a parallelogram, along with Cr and V; Tc is included here too
    21. Indium is the central element of the periodic table in terms of mean orbital radius and EN; Tc is next as per the EA chart
    22. The reversal of He compared to the rest of the NG reflects #24
    23. All of the Ln and An fall into an oval of basicity, bar Lr
    24. The reversal of the positions of Fr and Cs is consistent with Cs being the most electronegative metal
    25. A similar, weaker pattern is seen with Ba and Ra. 

Click to enlarge:

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Jodogne's Periodic Table of The Elements

Dr.Ir.Jodogne Jean Claude writes:

"I have the pleasure to send to you my paper on the PT which appears in Chimie Nouvelle 133 of the Soc.Royale de Chimie. However for the moment it is in French. The paper contains and explains the ultimate evolution of my preceding PT but it is the most scientifically based. Pedagogically, I believe it is interesting and easy. As you will see it keeps most of the chemical usual properties of the traditional one."

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artlebedev's 100,000 Permutation Periodic Table of The Elements

Moscow-based design company Art. Lebedev Studio have released a new Periodic Table which can be adapted for any task.

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What is the Periodic Table Showing? Periodicity

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