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: 1952 | PT id = 1054, Type = formulation |
Coryell's Periodic Table in Long Form
Charles D. Coryell The periodic table: The 6d-5f mixed transition group, J. Chem. Educ., vol. 29, no. 2, pp. 62–64 1952.
Coryell (1912–1971), was an American chemist involved in the discovery of promethium.
René Vernon writes:
"In Coryell's table, just two elements are shown as having two solid 'tie lines':
Yttrium: to La-Ac and to Lu-Ac
Silicon: to Ti-Zr-Hf and to Ge-Sn-Pb.
"These days Ti-Zr-Hf-Rf is deemed to make-up group 4 (rightly so given group 4 is the first to exhibit characteristic transition metal properties) whereas C-Si-Ge-Sn-Pb-Fl is deemed to make-up group 14.
The solid tie lines Coryell shows between Hf-Th, Ta-Pa, and W-U would now be rendered in broken form.
If Coryell's table was mapped to a 32- or 18-column form, group 3 would presumably be shown as bifurcating after Y.
The circle around indium is possibly a typo(?): indium has two stable isotopes, In-113 (4.29%) & In-115 (95.71%)... actually, In-155 has a half-life of 4.4x1014 years."
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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