The quantitative relationship between metal radii, cationic radii and electronic configurations of elements

A close relationship has been found between the metal radii, cationic radii and electronic configurations of elements. A unified formula for calculati ng metal radii is presented, whose parameters are only related to the elect ronic configuration. Meanwhile theoretical relation between cationic radii and electronic configuration can be-revealed by combining quantitative anal ysis with qualitative analysis. The calculated results and the charts of st andard deviations are coincident with those given by reference hooks. Our w ork indicates that the metal radius and cationic radius of an element refle ct in essence the element's a configuration.