Question

Strength of Cobalt-60 Source Due in 10 hours, 56 minutes Many radioisotopes have important industrial, medical, and research applications. One of these is 60co, which has a half-life of 5.20 years and decays by the emission of a beta particle (energy 0.310 Mev) and two gamma photons (energies 1.17 MeV and 1.33 MeV). A scientist wishes to prepare a 60Co sealed source that will have an activity of at least 10.0 Ci after 39.0 months of use If the activity is 10.0 Ci, how many 60Co atoms are in the source? Submit Answer Tries 0/10 What is the minimum number of nuclei in the source at the time of creation? Submit Answer Tries 0/10 What is the minimum initial mass of 60Co required? Submit Answer Tries 0/10

Answer 1