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College Nuclear Chemistry Questions

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College Nuclear Chemistry
Isotopes have:
  1. The same number of neutrons
  2. A different number of neutrons
  3. A different number protons
  4. A different number of electrons
College Nuclear Chemistry
Radioisotopes emit nuclear particles and radiation.
  1. True
  2. False
College Nuclear Chemistry
Radioisotopes are stable.
  1. True
  2. False
College Nuclear Chemistry
What is represented by c in the equation for nuclear binding energy?
  1. specific heat capacity
  2. temperature, in ºC
  3. capacitance
  4. the speed of light
College Nuclear Chemistry
Which of the following elements represents the nuclide with the highest energy per binding nucleon?
  1. iron-56
  2. barium-137
  3. manganese-56
  4. cesium-133
College Nuclear Chemistry
What is the significance of the graph of the binding energy per nucleon vs. mass number?
  1. Elements with an atomic number less than 56 participate in fusion
  2. Elements with a mass number greater than 56 participate in fission
  3. Elements with a mass number less than 56 participate in fission
  4. Elements with an atomic number less than 56 participate in fission
College Nuclear Chemistry
Which of the following equations correctly relates the nuclear binding energy to the mass defect?
  1. E=mc2
  2. ∆E=m∆c2
  3. ∆E=∆m∆c2
  4. ∆E=∆mc2
College Nuclear Chemistry
Which of the following units is equivalent to 1 joule of energy?
  1. amu•ms2
  2. amu•s2m
  3. kg•ms2
  4. s2•mkg
College Nuclear Chemistry
What is the value of k, assuming that 68 g of a 120-gram sample remains after 20 minutes?
  1. 0.28/minute
  2. 2.84/minute
  3. 28.4/minute
  4. 0.028/minute
College Nuclear Chemistry
Which of the following correctly describes the nuclear binding energy?
  1. The energy needed to keep the nucleus together
  2. The energy released when a nucleus is formed from neutrons and protons
  3. The energy released when a nucleus is broken apart
  4. (a) and (c)
College Nuclear Chemistry
What is the value of k, if 80 g of a 260-gram sample remains after 99 seconds?
  1. 119/second
  2. 0.119/second
  3. 0.0119/second
  4. None of the above
College Nuclear Chemistry
What is the value of k, if 70 g of a 167-gram sample remains after 37 years?
  1. 0.0235/year
  2. 2.35/year
  3. 23.5/year
  4. 235/year
College Nuclear Chemistry
How much of a 120-gram sample will remain after 20 seconds, assuming that k=0.05/second?
  1. 40.12 g
  2. 0.00025 g
  3. 44.15 g
  4. None of the above
College Nuclear Chemistry
What is the mass defect of S-32?
  1. 0.00 amu
  2. 0.198 amu
  3. 0.02 amu
  4. 2.00 amu