Periodic Table |
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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: 1964 | PT id = 1271, Type = formulation |
Ternström's Periodic Table
Ref: A Periodic Table, Torolf Ternström, J. Chem. Educ. 1964, 41, 4, 190
René Vernon writes:
"Ternström gives us a triple-combo table drawing on the advantages of:
- the complete block system according to Werner (1905)
- a horizontal Bohr line-system according to Spedding (1951)
The outcome resembles the left step form of Janet (1928).
Some interesting features of Ternström's formulation are:
- a period 0 containing the neutrino and neutron
- element number "00" for "v" suggests the neutrino has neither nuclear charge nor mass while "0" for Nn implies no nuclear charge
- regular period lengths of 2-2-8-8-18-18-32-32
- hydrogen has no direct relationship with a group, only secondary relationships with groups A1 and A7
- germanium, a semiconductor, is counted as a metal
- all groups numbered, where A = representative; B = transition
- C = Ln/An; analogous "transition" groups in the d-block (B8) and the f-block (C6)
- double periodicity among the Ln and An; and
- 25 columns wide i.e 18 + 32 = 50/2 = 25"
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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