5. Which nuclear decay product is the slowest? 6. How do beta particles and posi

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5. Which nuclear decay product is the slowest? 6. How do beta particles and positrons differ? 7. If polonium-210 is unstable because it has too much mass, what decay product is it most likely to produce to become stable? 8. What is the definition of a half-life? 9. What is the identity of the unknown product of beta decay of rhenium-187? 18775Re 0-1e + _______ 10. What nuclear decay particle is created by the decay of potassium-40 to calcium-40? 11. A 0.050 mg dose of iodine-131 was administered to a patient to treat hyperthyroidism. What is the remaining mass after 32.4 days? The half-life of iodine-131 is 8.1 days. 12. Isotopes are used in medicine for cancer treatment and medical imaging. Name an isotope for cancer treatment as an example. 13. Now name another isotope used in medical imaging, and the name of technique. 14. Why would isotopes used for cancer treatment not be used for medical imaging? 15. Name three of the five principles for minimizing exposure to ionizing radiation. 16. Which measurement is most useful for detecting harm to personal from radioactive material, the curie, roentgen or rem? 5. Which nuclear decay product is the slowest? 6. How do beta particles and positrons differ? 7. If polonium-210 is unstable because it has too much mass, what decay product is it most likely to produce to become stable? 8. What is the definition of a half-life? 9. What is the identity of the unknown product of beta decay of rhenium-187? 18775Re 0-1e + _______ 10. What nuclear decay particle is created by the decay of potassium-40 to calcium-40? 11. A 0.050 mg dose of iodine-131 was administered to a patient to treat hyperthyroidism. What is the remaining mass after 32.4 days? The half-life of iodine-131 is 8.1 days. 12. Isotopes are used in medicine for cancer treatment and medical imaging. Name an isotope for cancer treatment as an example. 13. Now name another isotope used in medical imaging, and the name of technique. 14. Why would isotopes used for cancer treatment not be used for medical imaging? 15. Name three of the five principles for minimizing exposure to ionizing radiation. 16. Which measurement is most useful for detecting harm to personal from radioactive material, the curie, roentgen or rem? 5. Which nuclear decay product is the slowest? 6. How do beta particles and positrons differ? 7. If polonium-210 is unstable because it has too much mass, what decay product is it most likely to produce to become stable? 8. What is the definition of a half-life? 9. What is the identity of the unknown product of beta decay of rhenium-187? 18775Re 0-1e + _______ 10. What nuclear decay particle is created by the decay of potassium-40 to calcium-40? 11. A 0.050 mg dose of iodine-131 was administered to a patient to treat hyperthyroidism. What is the remaining mass after 32.4 days? The half-life of iodine-131 is 8.1 days. 12. Isotopes are used in medicine for cancer treatment and medical imaging. Name an isotope for cancer treatment as an example. 13. Now name another isotope used in medical imaging, and the name of technique. 14. Why would isotopes used for cancer treatment not be used for medical imaging? 15. Name three of the five principles for minimizing exposure to ionizing radiation. 16. Which measurement is most useful for detecting harm to personal from radioactive material, the curie, roentgen or rem?

Explanation / Answer

5. U-238 nuclear decay is lowest because it has very high half life nearly 4.5 billion years so that its decay rate is very low ( t1/2 = 1/concentration)
6. Beta particles are 0e-1 and positrons have 0e+1. In a decay process beta particle is emitted then there is increase in the atomic number of product by one unit and if there is release of positron then there is decreasing in atomic number of product by one unit.
7. 210 Po 84 ------> 4 He 2 + 206 Pb 82. so Polonium emits alpha particle and give stable product.
8. The time required for substance to reduce it to half of its amount then it is called Half life of the substance.
9. 187 Re 75 ------> 0 e -1 + 187 W 74

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