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Uses of Radioisotopes (Grade 10)

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Uses of Radioisotopes

1. 
Which of the following nuclides can be used to date the remains of a dead organism?
  1. Lead-206
  2. Uranium-235
  3. Carbon-14
  4. Iodine-131
 
2. 
Which of the following radioisotopes can be used to detect problems with a person's thyroid?
  1. Carbon-14
  2. Iodine-131
  3. Uranium-235
  4. Technetium-99
3. 
Which of the following radioisotopes can be used to trace cancer?
  1. Co-60
  2. Tc-99
  3. I-131
  4. C-12
 
4. 
Which of the following radioisotopes can be used in the treatment of cancer?
  1. Co-66
  2. Tc-99
  3. I-131
  4. Pb-206
5. 
Which of the following radioisotopes can be used to date igneous rock?
  1. I-131
  2. U-238
  3. C-12
  4. Tc-99
 
6. 
Which of the following radioisotopes can be used in fertilizer?
  1. C-12
  2. I-131
  3. Pb-206
  4. P-31
7. 
Which of the following statements explain why radioisotopes of carbon can be used in dating trees?
  1. Trees take in carbohydrates
  2. Trees consume carbon dioxide gas
  3. Trees eat plants
  4. Trees are radioactive
 
8. 
Which of the following radioisotopes is least likely to be safe for humans, based on considerations of stability?
  1. Pb-206
  2. C-14
  3. I-131
  4. U-235
9. 
Carbon-14 has a half-life of 5715 years. A dead tree sample contains 1/16 as much C-14 as is present in a living tree sample. How old is the dead tree?



 
10. 
The beta particles released by I-131 are weaker in penetrating power than gamma particles are.
  1. True
  2. False
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