Meyer was just four years older than Mendeleev, and produced several Periodic Tables between 1864-1870. His first table contained just 28 elements, organised by their valency (how many other atoms ...

The section in the middle of the table is called the Transition Metals ... The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from non ...

The researchers suggest that it was in these pockets of transitional physics that the ... If so, it could form a periodic table, much like our own, that atlas of all known matter that includes ...

However, on a significant number of more recent periodic tables you will find lutetium and lawrencium classified as transition metals and placed directly underneath scandium and yttrium in group 3 of ...