Due to the relativistic stabilisation of 6p1/2 electrons polonium – usually present in the 4+ oxidation state – can be reduced to the 2+ oxidation state. This cation has – outside it's filled [Xe]4f5d electron shells two electron pairs: 6s and 6p1/2. No information is available about the ionic radius of Po and about it's coordination number of water molecules in aqueous solutions. The measureme...
