The Periodic Table, first created by Dmitri Mendeleev, organizes all of the known elements in an informative array.

Found at the heavier end of the periodic table, the lanthanides are the first elements to carry electrons in their 4f orbitals. Chemical dogma suggests that these orbitals are not keen on forming ...

Eric Scerri, a UCLA chemistry lecturer, has written at least six books discussing the orientation of the periodic table. His office is cluttered with posters and three-dimensional models of ...

Promethium, one of the rarest and most mysterious elements in the periodic table, has finally given up some crucial chemical secrets ...

It could be that the properties of the SHEs do not match those of elements above them in the periodic table, says Michael Block, who studies the physical characteristics of the new elements at GSI.

Scientists have created a periodic table of droplet motions, inspired in part by parallels between the symmetries of atomic orbitals, which determine elements' positions on the classic periodic ...

The discovery of element 117 filled the last remaining gap in the periodic table as we know it. But even as it is being completed, the table may be losing its power ...

A little-known genius figured out where all the elements in the periodic table should be placed long before some of them were discovered.

Here we have the periodic table showing only the valence, or outer electrons in each element. It is these outermost electrons that determine an element’s reactivity. Some patterns should stand out.

Others suggest that, in this case, using orbitals to determine placement in the periodic table is murky. Instead, other trends in the table such as those seen in the actual numerical values of ...