The orbital notation given pertains to the sodium atom.
According to the wave mechanical model, an orbital is a location in space where the electron has a high possibility of being found and where the electron can be structured, resulting in a specific orbital diagram.
The usage of orbital notation can help you grasp the electronic structure of atoms and ions. When utilizing orbital notation to represent the electrons in an atom or ion, arrows are used to signify the electrons and boxes are used to represent the orbitals. The orbital notation given pertains to the sodium atom.