Atomic orbitals are the basic building blocks of the atomic orbital model (alternatively known as the electron cloud or wave mechanics model), a modern framework for visualizing the submicroscopic ...

"They touch when the electron orbitals of one atom overlap enough with the electron orbitals of the other atom that physical or chemical effects start happening," Baird explained. "This is ...

We find that it is the 4s orbital electrons that are ionised first before the 3d orbitals. We have to conclude that, ironically for the d-block elements, the 4s orbitals are in fact higher in energy ...

The ligands are attached to the central atom by dative bonds ... but primarily limited to CT transitions between d- and π-orbitals. Here, CT emission from 4f- to π-orbitals is demonstrated ...