SOLVED

51) Choose the correct statement. A) Instability leading to decay by alpha particle emission is found mostly in nuclides of very large mass number. B) Decay by beta emission is confined to nuclides of very low mass number. C) Ejection of an electron by a nuclide results in a nuclide of next lower mass number. D) All radiations emitted by radioactive nuclides consist of charged, high energy particles. E) Many alpha and beta emissions are followed by gamma emissions. 52) Choose the correct word to describe the nuclear stability of the following isotope. If it is radioactive, choose the most likely mode of decay. A) radioactive, beta B) radioactive, fission C) radioactive, alpha D) radioactive, neutron E) stable 53) Choose the correct word to describe the nuclear stability of the following isotope. If it is radioactive, choose the most likely mode of decay. A) radioactive, beta B) radioactive, fission C) radioactive, alpha D) radioactive, neutron E) stable 54) Choose the correct word to describe the nuclear stability of the following isotope. If it is radioactive, choose the most likely mode of decay. A) radioactive, beta plus (positron) B) radioactive, fission C) radioactive, alpha D) radioactive, neutron E) stable 55) Choose the correct word to describe the nuclear stability of the following isotope. If it is radioactive, choose the most likely mode of decay. A) radioactive, beta B) radioactive, fission C) radioactive, alpha D) radioactive, neutron E) stable 56) Choose the correct word to describe the nuclear stability of the following isotope. If it is radioactive, choose the most likely mode of decay. A) radioactive, beta B) radioactive, fission C) radioactive, alpha D) radioactive, neutron E) stable 57) Which of the following nuclear species would require the least amount of kinetic energy to penetrate the nucleus of a lead (Pb) atom? A) B) C) D) E) 58) Choose the INCORRECT statement. A) Fission is the combining of small nuclei into a larger nucleus. B) Thermal neutrons induce more fission reactions than energetic neutrons. C) Water is a good moderator, it slows down neutrons. D) Control rods absorb neutrons. E) Breeder reactors generate new fuel as well as electricity. 59) Choose the INCORRECT statement. A) An isotope that will fission when hit by a neutron is said to be fertile. B) A moderator slows down neutrons. C) Control rods absorb energy to control the fission reaction. D) Electrons dislodged from an atom or molecule by alpha or beta particles are called primary electrons. E) Radiation exposes photographic film the same as light. 60) What total energy is released when 0.75 grams of 235U undergo fission if each atom averages 3.2 × 10-11 J of energy released? A) 1.45 × 1013 J B) 6.01 × 1031 J C) 6.15 × 1010 J D) 6.15 × 107 J E) 1.45 × 1010 J