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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: 

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Periodic Tables from the year 1947:

1947   Stedman's Design
1947   Stedman's Conic System
1947   Ageev's Crystalline Structures of The Elements
1947   Science Service: Two Periodic Tables

Year:  1947 PT id = 85

Stedman's Design

In his article Stedman says:

Thanks to René for the tip!

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Year:  1947 PT id = 291

Stedman's Conic System

D. F. Stedman, A Periodic Arrangement of the Elements, Canadian Journal of Research, 1947, 25b(3): 199-210,

Stedman's conic system from van Spronsen:

From c&en:

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Year:  1947 PT id = 1166

Ageev's Crystalline Structures of The Elements

Ageev NV 1947, The nature of the chemical bond in metal alloys (Izdvo Akad. Nauk SSSR, Moscow/Leningrad, p. 10

René Vernon writes:

"In this curious 18-column table, showing the crystalline structures of the elements, Ageev locates the predominately non-metallic groups on the left and the remaining groups on the right.

"It's odd that he located boron and aluminium on the far left over gallium, rather than over scandium. I suppose he did this so that gallium, indium, and thallium would not be mistaken for d-block metals.

"Reading from left to right then, Ageev's table could be said to be made up of five blocs:"

[1] the nonmetallic bloc
[2] the alkaline bloc
[3] the inner transition bloc
[4] the transition metal block
[5] a post-transition metallic bloc

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Year:  1947 PT id = 1243

Science Service: Two Periodic Tables

A two-sided Science Service periodic table from 1947. The one is listed as "After Bohr", the other as "After Mendeleeff".

René Vernon writes:

"Here’s a slightly odd table (with two sides):

    1. The neutron is included in group 0.
    2. Argon is still A; niobium Cb
    3. There's a blank space for Pm (discovered 1945).
    4. The main groups are recognisable, with the exception of group 3 as B-Al-Sc-Y-La. The other side of the table lists B-Al as being analogous to Sc-Y-La, rather than Ga-In-Tl.
      The former option works better than the latter in terms of the quantitative smoothness of chemico-physical trend lines going down the group."

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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