Free radicals a:0 Molecule with odd number of electrons “Open Shell'' Typically highly reactive Some atmospheric radicals Cl,Br H 0 CIO OH NO BrO 02H VI-12Molecule with odd number of electrons “Open Shell” Typically highly reactive Some atmospheric radicals Cl, Br H O ClO OH NO BrO O2H Free Radicals :Cl:O. •• •• •• •• VII-12