chemed.chem.purdue.edu chemed.chem.purdue.edu chemed.chem.purdue.edu purdue.edu chemed.chem.purdue.edu purdue.edu chemed.chem.purdue.edu Halogen chemed.chem.purdue.edu chemed.chem.purdue.edu The Chemistry of the Halogens http://chemed.chem.purdue.edu/genchem/t … group7.php The Chemistry of the Halogens