出典:Wikipedia
出典:『Wikipedia』 (2010/12/08 00:30 UTC 版)
Core charge is the effective charge experienced by an outer shell electron, taking into account the shielding effect of inner shell electrons. Core charge can be calculated by the addition of the number of protons in the nucleus minus the number of inner shell electrons and is always a positive value. For the main group elements the core charge is simply the group number.