University of Colorado
University of Colorado: Physics 2000: Halflife
An interactive tutorial on half life. Very readable and has a little extra for the advanced student.
Science Struck
Science Struck: List of Radioactive Elements
Learn about radioactivity, the different types of radioactive decay, isotopes, and half-life of a radioactive element. Includes a long chart listing radioactive elements, atomic number and mass number, decay type, and length of half-life.
Science Struck
Science Struck: Isotopes of Carbon
Describes the characteristics of carbon and what an isotope is. Presents a chart of carbon isotopes listing nuclide symbol, atomic weight, half-life, and nuclear spin, as well as a second chart listing radioactive carbon isotopes....
Science Struck
Science Struck: Bromine Isotopes
Describes the chemical properties of bromine and what an isotope is. Presents a chart of bromine isotopes listing nuclide symbol, neutron number, isotopic mass, and half-life, as well as a second simpler chart with more bromine isotopes.