Home › Forums › electronic structure › electronic structure – chapter forum › 3s flat before 3p? This topic has 1 reply, 2 voices, and was last updated 2 years ago by Stefaan Cottenier. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts November 10, 2022 at 11:49 am #7723 Ruben QuirozParticipant I don’t get why the order of flattening is 3s->3p->4s->unoccupied. I would assume the ‘loosly’ bound electronbands go to the inifinte limit first… November 14, 2022 at 10:02 am #7805 Stefaan CottenierKeymaster This will be dealt with in the feedback webinar (hint: losely bound = extending further into space = more distance needed to get uncoupled). Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In