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| What is the Periodic Table Showing? | Periodicity |
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. The database holds information on periodic tables, the discovery of the elements, the elucidation of atomic weights and the discovery of atomic structure (and much, much more).
| Year: 2020 | PT id = 1161, Type = formulation |
Vernon's Periodic Treehouse
René Vernon's Periodic Treehouse of the Elements, fearuring the World's longest dividing line between metals and nonmetals.
René writes:
I can't remember what started me off on this one. It may have been Mendeleev's line, as shown on the cover of Bent's 2006 book, New ideas in chemistry from fresh energy for the periodic law.
There are a few things that look somewhat arbitrary, so I may revisit these:
- Ce is known at +4, Pr is known as +5, and I recall seeing some speculation about the possibility of Nd +6. (Pm +7 may be overreach.)
- Tl is lined up under Au even though Tl prefers +1. That said Au is not adverse to +1.
- I stopped at Hs since the limits of SHE chemistry just about runs out there.
- The dividing line between metals and nonmetals is 73 element box sides long.
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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