User:TyEvSkyo/Two-dimensional spiral (Benfey, 1964)

Benfey's Two-Dimensional Spiral is an alternate model to the periodic table, where the elements start from hydrogen and go outward, forming the following pennensulars: Transition Metals, Lanthanides and Actinides, as well as Superactinides.

History
Benfey developed this form of the Periodic Table while he was the editor of the ACS chemical education magazine, "Chemistry". It has been used in at least two textbooks.