How do i write electronic configuration of an elctron in its excited state?
To write the electron configuration for an excited state of an atom, promote one or more of the electrons to a higher energy orbital. For example, the ground state electron configuration of He is: 1s^2. A possible excited state would be 1s^1 2s^1. One of the electrons has been “bumped up” from the 1s orbital to the 2s orbital.