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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 1300 Period Tables in the database: 

  Text Search:       


Periodic Tables referencing the text string "Nagayasu", listed by date:

1992   Chemical Slide Rules
2016   NAWA's byobu-Janet Periodic Table
2016   Clock Face Periodic Table
2016   Sensu Periodic Table
2017   NAWA's Periodic Tables
2017   Clock Prism Periodic Table, Braille Version
2018   Nawa's V.E.T. Periodic Table & Hourglass
2019   NAWA's Version of Moran's Periodic Spiral
2020   Nawa Version of Maeno's Nuclear Periodic Table
2020   Rainbow Periodic Table in ADOMAH Cube
2021   Nawa's Rainbow Periodic Table
2021   Nawa's Multi Periodic Table
2022   Electronegativity Seamlessly Mapped Onto Various Formulations of The Periodic Table
2023   Semicircular Hybrid Chart of the Nuclides


Year:  1992 PT id = 1045, Type = formulation misc review

Chemical Slide Rules

The first chemical slide rules are of interest here because they are, in effect, early periodic tables. But the are more than this, as they can be used for performing chemical calculations. Writing in Bull. Hist. Chem. 12 (1992) (and here), William D. Williams of Harding University writes:

"An article by George Bodner in the Winter 1990 issue of the Bulletin described a rare chemical slide rule designed by Lewis C. Beck and Joseph Henry - their little-known Improved Scale of Chemical Equivalents. [My] paper attempts to place this slide rule in context by describing its origins, as well as some of its predecessors and successors."

Some chemical slide rules mentioned in the text:

Nagayasu Nawa writes and provides an explanation as how Wollaston's chemical equivalents slide rules should be used:

"It is very interesting slide rule for me. Because we actually used slide rule in 1960s. There were not the electronic calculator in the world. I think it would be used as a simple slide rule of The Law of Definite Proportions by J.L. Proust 1799."

Click image to enlarge:

Thanks to Nawa for the tip!

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Year:  2016 PT id = 724, Type = formulation

NAWA's byobu-Janet Periodic Table

NAWA, Nagayasu: A Japanese schoolteacher and periodic table designer presents a Janet form periodic table in the traditional Japanese "byobu" style:

NAWA's byobu-Janet Periodic Table
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Year:  2016 PT id = 727, Type = formulation spiral

Clock Face Periodic Table

In 2014 Prof. Martyn Poliakoff – of YouTube fame – showed us a working Periodic Table clock, here.

The designer of the clock, Nagayasu (a Japannese school teacher), has now provided a fuller periodic table based on the same design:

clock

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Year:  2016 PT id = 729, Type = formulation

Sensu or Fan Periodic Table

By NAWA, Nagayasu — A Japanese schoolteacher and periodic table designer — a "Sensu" or fan periodic table:

Sensu or fan

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Year:  2017 PT id = 747, Type = formulation

NAWA Periodic Tables

Nagayasu Nawa - "A Japanese school teacher and periodic table designer" - has a home page showing all his designs:

NAWA Periodic Tables

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Year:  2017 PT id = 760, Type = formulation 3d misc

Clock Prism Periodic Table, Braille Version

From the prolific Nagayasu Nawa, a Braille version of the Clock Prism periodic table:

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Year:  2018 PT id = 949, Type = formulation data misc

Nawa's V.E.T. Periodic Table & Hourglass

Nagayasu Nawa, the prolific designer of periodic tables, here and here, has come up with an orbital filling periodic table and a corresponding hourglass animation. Nawa writes:

"I have turned the v.e.c. PT into the GIF animation that I call the electron hourglass, 1 second for each element. It takes 120 seconds from 1H to 120 Ubn. I have coloured orbital with colour derived from each shell's name, such as:

Click image to enlarge.

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Year:  2019 PT id = 1014, Type = formulation spiral

NAWA's Version of Moran's Periodic Spiral

Periodic table designer Nagayasu Nawa has put his spin on Moran's Periodic Spiral:

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Year:  2020 PT id = 1113, Type = formulation data

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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Year:  2020 PT id = 1175, Type = formulation 3D

Rainbow Periodic Table in ADOMAH Cube

From the prolific Nagayasu Nawa, a version of his Rainbow Periodic Table inside Valery Tsimmerman's glass cube:


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Year:  2021 PT id = 1196, Type = data misc

Nawa's Rainbow Periodic Table

Nagayasu Nawa - "A Japanese school teacher and periodic table designer" - has developed a Rainbow Periodic Table that is stuffed full of data.

Click here to download the .pdf file.

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Year:  2021 PT id = 1197, Type = formulation data spiral

Nawa's Multi Periodic Table

Nagayasu Nawa - "A Japanese school teacher and periodic table designer" - has developed a "Multi" Periodic Table with three formulations: long-form, upsidedown long-form & circular with era of discovery, electronic structure and abundance data.

Click here to download the .pdf file.

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Year:  2022 PT id = 1241, Type = data

Electronegativity Seamlessly Mapped Onto Various Formulations of The Periodic Table

A discussion on the Google Groups Periodic Table Discussion List, involving a René Vernon, Nawa Nagayasu & Julio Samanez (all contributors this database) lead to the development of the representations below, showing electronegativity seamlessly mapped onto a modified Left-Step Periodic Table:



Nawa Nagayasu has mapped electronegativity to Mendeleeve's formulation:

Nawa Nagayasu has mapped electronegativity onto other formulations, Julio's Binode Spiral:

Courtine's 1926 formulation:

and the "conventional", short, medium and long forms of the periodic table with hydrogen above and between B & C which show the botom-right-to-top-left electronegativity trend:

Jeff Moran's Spiral:

René Vernon's 777 Periodic Wedding Cake:

Valery Tsimmerman's ADOMAH formulation:

Valery Tsimmerman's ADOMAH tetrahedron (in a glass cube) formulation:

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Year:  2023 PT id = 1287, Type = formulation element data misc spiral

Semicircular Hybrid Chart of the Nuclides

Nawa Nagayasu has produced a new version of the Segrè Chart of the Nuclides.

Nawa writes:

"The chart has the number of neutrons on the [curved] horizontal axis and the number of protons (atomic number) on the vertical axis. I used the IAEA colour coding [scheme]. JAEA's half-life ranks are indicated by simple numbers, not rounded frames.

"In order to fit the whole chart into a semicircle, the axis representing the number of neutrons was made a spiral-like curve. For clarity, the number of neutrons is shown in the middle of each curve."

Yuri Oganessian has commented:

"Nawa Nagayasu is an original and talented designer. After all, it is not easy to work with 118 elements, but now also with isotopes, of which there are more than 3000. The fan design looks attractive and this is very important. This will make people, especially school age, guess the numbers that are written there. So they will gradually delve into the content of the Table, a truly brilliant creation."

Click image to enlarge

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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