• The most common isotope of uranium, U-238, has atomic mass 238.050788 u. Calculate (a) the mass defect; (b) the binding energy (in MeV); (c) the binding energy per nucleon.
• A 12.0-g sample of carbon from living matter decays at the rate of 172.5 decays/minute due to the radioactive Carbon-14 in it. What will be the decay rate of this sample in (a) 1000 years and (b) 50,000 years?
• The common isotope of uranium, U-238, has a half-life of 4.4710⁹ years, decaying to Th-234 by alpha emission. What is the decay constant?