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: 2008 | PT id = 1302, Type = formulation |
Franklyn's Periodic Table
Franklyn writes on sciencemaddness.org: Electronic Orbital Periodicity Mendelevian grouping is only one possible organizational scheme, regardless of the schematic choice. A table is useful only to the extent that it provides easy reference to data and comparison. Most everyone who has considered arranging elements in tabular form has pondered what layout best serves the purpose. Below is a table I once made to determine the electronic shell and orbital structure of any element at a glance. Everything to the left and above the elements position indicates the complete full orbitals for those shells. Actually you can see the goup memebers run diagonally from upper left to lower right This arrangement shows that the progression of successive electrons is not straight forward with regard to placement within the atoms. The Mendelevian sequence begining with period 6 through the Lanthanides back to period 6 transition metals until Radon, continuing with period 7 ending with the first member of the Actinides, is as follows:
- shell 6, s orbital - Cesium, Barium (Cs, Ba)
- shell 5, d orbital - Lanthanum (La)
- shell 4, f orbital - Cerium to Lutecium (Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu)
- shell 5, d orbital - Hafnium to Mercury (Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg)
- shell 6, p orbital - Thallium to Radon (Tl, Pb, Bi, Po, At, Rn)
- shell 7, s orbital - Francium, Radium (Fr, Ra)
- shell 6, d orbital - Actinium (Ac)
- shell 5, f orbital - Thorium (Th)
Thanks to René Vernon for the tip!
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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