# How can we find the eV value of molecular orbital diagrams for a given atom?

It seems like sometimes the electron volt value of the molecular orbital is given but most of the time it just shows relative values of s p d orbitals. Is there some lookup table for such values?

• It can be either experimentally determined (look up photoelectron spectroscopy) or just calculated with a computer (lots of QM if you want to find out more - start with the secular equations perhaps). – orthocresol Nov 13 '15 at 17:01