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 hold information on periodic tables, the discovery of the elements and elucidation of atomic weights (and 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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