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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:

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Periodic Table formulations from the year 1994:

1994   Where Should Aluminium Go?
1994   Discovery of Darmstadtium
1994   Discovery of Roentgenium
1994   f-Block Elements 3D Periodic Table


1994

Where Should Aluminium Go?

Fathi Habashi aruges in Chemistry in Education (1994) that aluminium, Al, should be placed above scandium and next to magnesium. There is more information about this formulation here:

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1994

Discovery of Darmstadtium

Ds

Darmstadtium, atomic number 110, has a mass of 281 au.

Synthetic radioactive element.

Darmstadtium was first observed in 1994 by S. Hofmann et al.

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1994

Discovery of Roentgenium

Rg

Roentgentium, atomic number 111, has a mass of 280 au.

Synthetic radioactive element.

Roentgenium was first observed in 1994 by S. Hofmann et al.

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1994

f-Block Elements 3D Periodic Table

From conference in Helsinki on the f-Block Elements to commemorate the bicentennial of Johan Gadolin's 1794 analysis of Yittria.

Pekka Pykkö writes to say:

"We used [this formulation] in Helsinki in 1994 on the cover of ICFE-2 conference proceedings. Who invented it or where it was copied from, I do not know. Anyway, all the hundreds of participants received it from us":

Claude Piguet's paper, Chimia 73 (2019) 165–172, also uses this 3D version of the standard periodic table. The text says: "Periodic table highlighting the location of Rare Earths (red elements). The elements shown in blue correspond to the actinide series":

Thanks to Eric Scerri for the tip!
See the website EricScerri.com and Eric's Twitter Feed.

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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