1. The half-life of 90Sr is 29.1 y. If a sample initially contains 50.00 g of 90Sr, how much 90Sr remains after 58.2 y?
2. The current disintegration rate for carbon-14 is 14.0 Bq. A sample of wood discovered in an archaeological excavation is found to have a carbon-14 decay rate of 0.875 Bq. If the half-life of carbon-14 is 5,700 y, approximately how old is the wood sample?
3. What role does cadmium metal (Cd) play in a nuclear reactor?
a. Transfers heat from the reactor to the heat exchanger (primary coolant)
b. Undergoes fission (fuel rods)
c. Controls chain reaction (control rods)
d. Slows down the fission neutrons (moderator)
e. Transfers heat from the condenser to the environment (cooling tower)
4. The 3H isotope of hydrogen is called _______.
5. Which of the following statements is true about hydrogen fusion?
a. To perform fusion, extremely low pressures and temperatures are necessary.
b. The mechanism behind an atomic bomb is hydrogen fusion.
c. Hydrogen fusion is caused due to a nuclear chain reaction.
d. Hydrogen fusion takes place in the interiors of starts
e. During hydrogen fusion, a wide range of isotopes are produced
6. Which of the following daughter isotopes will be produced after the radioactive decay of actinum-227 by alpha particle emission?
a. Polonium-218
b. Radium-226
c. Thorium-226
d. Francium-223
e. Astatine-211
7. 1Gy = _____
a. 0.01 J/kg
b. 0.1 J/kg
c. 1,000 J/g
d. 1 J/kg
e. 100 J/g
1. The half-life of 90Sr is 29.1 y. If a sample initially contains 50.00 g of 90Sr, how much 90Sr remains after 58.2 y?
2. The current disintegration rate for carbon-14 is 14.0 Bq. A sample of wood discovered in an archaeological excavation is found to have a carbon-14 decay rate of 0.875 Bq. If the half-life of carbon-14 is 5,700 y, approximately how old is the wood sample?
3. What role does cadmium metal (Cd) play in a nuclear reactor?
a. Transfers heat from the reactor to the heat exchanger (primary coolant)
b. Undergoes fission (fuel rods)
c. Controls chain reaction (control rods)
d. Slows down the fission neutrons (moderator)
e. Transfers heat from the condenser to the environment (cooling tower)
4. The 3H isotope of hydrogen is called _______.
5. Which of the following statements is true about hydrogen fusion?
a. To perform fusion, extremely low pressures and temperatures are necessary.
b. The mechanism behind an atomic bomb is hydrogen fusion.
c. Hydrogen fusion is caused due to a nuclear chain reaction.
d. Hydrogen fusion takes place in the interiors of starts
e. During hydrogen fusion, a wide range of isotopes are produced
6. Which of the following daughter isotopes will be produced after the radioactive decay of actinum-227 by alpha particle emission?
a. Polonium-218
b. Radium-226
c. Thorium-226
d. Francium-223
e. Astatine-211
7. 1Gy = _____
a. 0.01 J/kg
b. 0.1 J/kg
c. 1,000 J/g
d. 1 J/kg
e. 100 J/g
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