Periodic Table
T-Shirts & more
from the
meta-synthesis



Merch Store


previous home next

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 from the year 1937:

1937   Pozzi's Spiral Periodic Table
1937   Zmaczynski's Fan-Shaped System
1937   Discovery of Technetium
1937   Geochemical Periodic Table (Goldschmidt Classification)


Year:  1937 PT id = 25, Type = formulation spiral

Pozzi Spiral Periodic Table

A spiral periodic table formulation constructed by E.C. Pozzi in 1937, from here.

Note the "Strong Positive, Strong Negative, Weak Positive and Weak Negative" corners:

Top of Page

Year:  1937 PT id = 286, Type = formulation

Zmaczynski's Fan-Shaped System

Zmaczynski's fan-shaped system of 1937 (from van Spronsen):

Top of Page

Year:  1937 PT id = 823, Type = element

Discovery of Technetium

Tc

Technetium, atomic number 43, has a mass of 98 au.

Radioactive element: Tc is only found in tiny amounts in nature. Most samples are synthetic.

Technetium was first isolated in 1937 by C. Perrier and E. Segrè. The element had been predicted by Mendeleev in 1871 as eka-manganese.

Top of Page

Year:  1937 PT id = 1074, Type = data

Geochemical Periodic Table (Goldschmidt Classification)

From Wikipedia: The Goldschmidt Classification is a gechemical periodic table which groups the chemical elements within the Earth according to their preferred host phases into:

Some elements have affinities to more than one phase. The main affinity is given in the table below and a discussion of each group follows that table.

Top of Page

previous home next
What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


Queries, Suggestions, Bugs, Errors, Typos...

If you have any:

Queries
Comments
Suggestions
Suggestions for links
Bug, typo or grammatical error reports about this page,

please contact Mark R. Leach, the author, using mark@meta-synthesis.com

This free, open access web book is an ongoing project and your input is appreciated.