This radiochemistry course is designed for those who are beginning careers in radiochemistry and for more advanced radiochemists who may need a refresher course. The course emphasizes the analytical aspects of radiochemistry. The course should also be useful to quality assurance officers, data validators and others who may need understanding of radiochemistry in their work. Topics to be covered include introductory material about the atomic nucleus, radioactive decay processes, interaction of radiation with matter and counting techniques such as gamma spectroscopy, alpha spectroscopy, liquid scintillation counting and gas flow counting. The statistical aspects of radioactive decay are also discussed as well as common problems in the radiochemical laboratory.