By the periodic table’s logic, all d-block elements should have filled s orbitals. But copper defies that logic. It should have the electron configuration [Ar] 3d 9 4s 2 .

The first version of the periodic table would not come along for more than a hundred and forty years after his death. ... So we can have up to 3 orbitals on the xyz axes of a Cartesian system.

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 periodic table traditionally taught in textbooks, which organizes elements based on chemical traits such as reactivity, places helium in the rightmost column with the other less reactive elements.

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 ...

In the late 1920s, Janet turned his perceptive powers to the chemical elements. He designed various new versions of the periodic table. Unlike most other tables constructed before then, his ...

The discovery of element 117 filled the last remaining gap in the periodic table as we know it. ... or “orbitals,” as those of lower numbers, while adding new types.

In their momentary life span, atoms of lawrencium, element 103, may have left a lasting impression on the structure of the periodic table. For the first time, researchers have measured a basic ...

Chemical elements on the periodic table also have family resemblances that could provide predictive insight into the way elements interact, leading scientists to not-yet-imagined applications.