1. a. When the nucleus of a uranium-235 atom is divided into two smaller nuclei, mass is converted into energy. Where does this energy originate? b. Boron undergoes fission via thermal neutron capture to produce lithium-7, an alpha particle and energy in the following reaction: n+ "B- Li+ He Using the data below, calculate mass defect (in u and kg) and binding energy (in J and MeV) for this reaction. mass of a neutral boron atom 10.012 939 u mass of a neutral lithium-7 atom 7.016 005 u mass of a neutral helium-4 atom 4.002 603 u mass of a neutron 1.008 665 u

Which of the following describes safeguards used in nuclear power plants to protect the environment? I. Radioactive sections of the plant are cleaned every week. II. Cooling the reactor prevents an explosion and leak of radiation. III. A mixture of different forms of uranium prevents explosions. O l only Ol and II O Il and III O , II, and III

True or false: nuclear fission reactors produce electrical energy that is used to turn a turbine.   Question 5 options:   True   False

Using the diagrams below, label the nuclear process as fission or fusion. Explain how you identified whether it was fusion or fission based on the diagram.

Which of the following statements about nuclear fission is true?  a. No new elements can be produced in a fission reaction. b. Energy released in fission reactions is generally less than that from fusion reactions.  c. In a fission reaction, two light nuclei are combined into a heavier one.  d. Fission reactions can be explained on the basis of the conservation of mass-energy.