advertisement

Nuclear Chemistry Worksheet: 1. What is the charge carried by a beta particle? (A) -1 (C) +1 (B) 0 (D) +2 2. Iodine-131 undergoes "beta decay". What other particle is produced? (A) Xe-131 (C) I-130 (B) Te-131 (D) Sb-127 3. What type of radiation is simply a very energetic form of light? (A) alpha (C) gamma (B) beta (D) positron 4. Complete the following nuclear equations. a. 28 Al _____ + b. ______ c. 210 d. 35 234 Th + Bi _______ + S _______ + 5. Strontium - 85, used for bone scans, has a half-life of 64 days. A 120 g sample of strontium - 85 is stored for 192 days. How many grams of the strontium - 85 remains? 6. Iodine - 131, used to diagnose and treat thyroid conditions, has a half-life of 8 days.How many days does it take for the amount of iodine - 131 in the sample to decrease from 80 g to 5 g? A radioisotope’s half-life is 2.000 minutes. If you start with a 24.00 gram sample: 7. How much of the sample would be left after 8.00 minutes? (A) 3.00 grams (C) 0.75 grams (B) 1.50 grams (D) 0.375 grams 8. How much time must pass before you will have only 1/8th of your original sample? (A) 4 minutes (C) 8 minutes (B) 6 minutes (D) 10 minutes 9. If you began with a 48.00 gram sample, how would the half-life change? (A) it would double (B) it would remain the same (C) it would be half as much 10. Iodine-131 has a half-life of 8 days. What percent of a sample would remain after 24 days? (A) 75% (B) 50% (C) 25% (D) 12.5% Answers: 1. A 2. A 3. C 4. a. 28Si b. 23892U c. 20681Tl d. 3517Cl 5. 30 g 6. 32 days 7. B 8. B 9. B 10. C