Radical ion

An ion, either a cation or anion, containing unpaired electrons in its ground state. The unpaired electron is denoted by a superscript dot alongside the superscript symbol for charge, such as for the molecular ion of a molecule M, that is, M^{+?????????????????????}. Radical ions with more than one charge and/or more than one unpaired electron are denoted such as M^{(2+)(2?????????????????????)}.Unless the positions of the unpaired electron and charge can be associated with specific atoms, superscript charge designation should be placed before the superscript dot designation.