Instead, the debate is over the block in which lawrencium sits. Currently, it is the last element in the “f-block,” the family of elements thought to produce fundamental spectroscopic lines.

This Collection aims to highlight progress in f-element chemistry, including fundamental electronic structure, advances in separation, coordination and organometallic chemistry, and the ...

The lanthanide (4f) and actinide (5f) elements (collectively the “f-block”) comprise around a quarter of the periodic table, and many are essential to key aspects of modern life and society ...