With Glenn T. Seaborg's 1945 discovery that the actinides were in fact f-block rather than d-block elements, a recognisably modern form of the table was reached. The periodic table and law are now a ...

Some periodic tables place lutetium and lawrencium one above the other, as the last of the lanthanides and the actinides respectively. However, on a significant number of more recent periodic tables ...

But there's at least one substance in the periodic table that was named in response to a nearby element, and that's americium, the element that looks as if it should be pronounced [AMER-ICK-IUM]. It ...

Where actinide-element multiple bonding is concerned ... whilst metal-element multiple bond investigations are routinely reported and well established across the Periodic Table right up to uranium, ...