Glossary Molecular ion -The ion obtained by the loss of one electron from the molecule (m) Base peak-The most intense peak in the MS, assigned 100%intensity Radical cation-positively charged species with an odd number of electrons Fragment ions-Lighter cations (and radical cations)formed by the decomposition of the molecular ion.These often correspond to stable carbcations. .m/z-mass to charge ratioGlossary • Molecular ion - The ion obtained by the loss of one electron from the molecule (m+ ) • Base peak - The most intense peak in the MS, assigned 100% intensity • Radical cation - positively charged species with an odd number of electrons • Fragment ions - Lighter cations (and radical cations) formed by the decomposition of the molecular ion. These often correspond to stable carbcations. • m/z - mass to charge ratio