Question 1
The smallest amount of radioactive material that will support a self-sustained fission reaction is called the
◦ molar mass
◦ moderator
◦ supercritical mass
◦ subcritical mass
◦ critical mass
Question 2
The zirconium-90 nucleus has a mass defect of 0.8214 g/mol.
Determine the binding energy per nucleon for zirconium-90 nuclei. (1 MeV is 1.602 × 10–13 J).
◦ 7.652 × 10–5 MeV
◦ 7.652 × 102 MeV
◦ 19.13 MeV
◦ 11.83 MeV
◦ 8.502 MeV