Internet Database of Periodic Tables
There are thousands of periodic tables in web space, but there is only one comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Dr Mark R Leach.
Use the buttons below to select from the 1000+ Periodic Tables in the database:
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."
Top of Page
|Periodic Table, What is it showing?
© Mark R. Leach 1999-
Queries, Suggestions, Bugs, Errors, Typos...
If you have any:
Suggestions or periodic table representations not shown on this page
Suggestions for links
Bug, typo or grammatical error reports about this page,
please contact Mark R. Leach, the author, using firstname.lastname@example.org
This free, open
access web book is an ongoing project and your input is appreciated.