The INTERNET Database of Periodic Tables
|2019 has been designated the International Year of the Periodic Table as it is the 150th Anniversary of the formulation of Mendeleev's Tabelle I|
Sanderson's Periodic Table of the Chemical Elements
Sanderson's 1967 formulation has both the d-block elements and the f-block elements totally removed from the body of the table thus allowing the elements in the Major Groups of Periods 4, 5 and 6 to be grouped with the "typical" elements of Periods 2 and 3.
The Inner Transition elements are from Ce to Yb, i.e., in this 'rational' arrangement there are only thirteen lanthanide metals.
From Michael Laing's paper: A Revised Periodic Table with the Lanthanides Repositioned, Found. Chem. (2005) 7: 203–233
|Periodic Table, What is it showing?||
© Mark R. Leach 1999-
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