1. Write a balanced nuclear equation for the beta decay of 4219K
2. Write a balanced nuclear equation for the alpha decay of 21083Bi
3. When 5828Ni was bombarded with a proton, the products were an alpha particle and another isotope. Write the balanced nuclear equation for the reaction.
4. Californium-246, is element 98 in the periodic table. It was formed by bombarding uranium-238 with a small nucleus. During this transmutation, four neutrons are emitted. What was the bombarding nucleus?
5. A 100.0mg sample of Potassium-45 , a beta-emitter, was isolated in pure form. After two hours, only 6.2mg of the radioactive material was left. What is the half- life of Potassium-45 ?
6. A sample of I-131 has an activity of 205mCi. How many atoms of the sample will disintegrate in 3 minutes?
7. Patient Q received 150rads of alpha radiation. Calculate the equivalent dose in mrems. The factor that adjusts for biological damage is 20 for alpha particles.
8. If the amount of radioactive phosphorus-32 in a sample decreases from 1.2g to 0.3g in 28 days, what is the half-life of phosphorus-32?
9. An 80.0mg sample of 99m43Tc is used for a diagnostic test. If Tc-99m has a half-life of 6.0hr, how much of the Tc-99m sample remains, 36hr after the test?
10. A vial contains radioactive I-131 with an activity of 2.0mCi per milliliter. If a thyroid test required 3.0mCi of I-131, how many milliliters of the sample of I-131 were used?