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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: 1954 | PT id = 1255, Type = formulation |
Ephraim's Periodic Classification
Ephraim F 1954, Inorganic Chemistry, 6th ed., Oliver and Boyd, London (revised by PCL Thorne and ER Roberts)
René Vernon writes that items of interest include:
- The position of H "Which [according to Ephraim] is difficult to place in this table in a satisfactory manner", outside of the main body of the periodic table, "remote from both Li and F, well removed from C, and above He and the inert gases"
- The old school location of B-Al in Group IIIa
- C-Si belong to both Ti-Zr-Hf-Th and Ge-Sn-Pb
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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