The discussion centers on the electronic configuration of chromium and its 2+ ion. It begins by examining the occupied orbitals in a neutral chromium atom, which includes the 4s, 4p, and 3d orbitals. The configuration of the Cr 2+ ion is then analyzed, highlighting the removal of electrons from the 4s and 3d orbitals. The focus is on identifying which orbitals remain unfilled and how this relates to the ion's ability to form dative bonds. Ultimately, the conversation emphasizes the importance of understanding orbital occupancy in determining bonding characteristics.