Mar 26, 2020 Therefore the expected electron configuration for Copper will be 1s ... For example, oxygen has six valence electrons, two in the 2s subshell and.... cu2+ electron configuration ground state, A eff of 3.78 B indicates a d3 electronic ... Copper has this configuration because a full d10 subshell has lower energy, ... partial orbital diagrams showing valence electrons only, and number of inner.... Abstract. In this study we explore the implications of oxygen vacancy formation and o