Molecular ion and Free Radical

 Molecular ion

                        Molecular species having positive or negative charge.Molecules is a neutral species and have  same number of electrons and protons.but in  Molecular ions number of electrons and proton are not same.

 

Free Radical

                    A free radical is an atom or ions or a molecules containing odd number of electrons .
 they are very reactive and short lifetimes because they reacts with other substance with which they come in contacts 

 

For example 

                    Methyl chloride 
                    Hydroxyl radical