The activity of a sample is 640 Bq. It's half-life is 3 hours. Calculate the percentage of activity remaining after 6 hours. Half Life

  • 25%
  • 25
1400 students attemted this question.

Explanation

No Explanation Available.

Share this question with friends

Similar Questions

  1. A radioactive source has an activity of 800 Bq. It has a half-life of 4 hours. Calculate its activity after 24 hours.

  2. The initial activity of a sample is 600 Bq. Calculate the percentage reduction in activity after 3 half-lives

  3. The activity of a source is 680 Bq. After one full day its activity is has fallen to 85 Bq. Calculate its half-life.

  4. Calculate the activity of the sample after 3 half-lives.

  5. A radioactive isotope has a half-life of 3 days. It's current activity 52 Bq. Calculate its activity 9 days ago.

  6. Which sample would have the greatest amount remaining after 1 minute?

  7. Which sample would have the least amount remaining after 1 minute?

  8. After 4 half-lives, 1.0 g of a sample of Krypton-85 remains. What was the original mass of the sample?

  9. Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half-lives. How much time will elapse for this sample to be considered gone?

  10. If you start with a complete sample, how much of the sample is left after the third half-life?

  11. A bone sample contains only 1/4 of its original radioactive C14 content. How old is the bone sample?

  12. The half life of iodine-131 is 8.040 days. What percentage of an iodine-131 sample will remain after 40.20 days?

  13. Which diagram best represents the percentage of this radioactive isotope sample that will remain after 2 half-lives?

  14. A sample of wood that originally contained 100 grams of carbon-14 now contains only 25 grams of carbon-14. Approximately how many years ago was this sample part of a living tree?

  15. Use the half-life graph to calculate the half-life of the sample.

  16. Technetium-99 isotope has a half-life of 6.0 hours. If 100.0 mg were injected into a patient how much remains after 18 hours?

  17. The % of the parent isotope remaining after 3 Half Lives.

  18. Which of the following samples would have the greatest amount remaining after 28 days?

  19. The half-life of strontium-90 is 25 years. How much strontium-90 was originally present if 0.25 g is present in a sample after 100 years?

  20. After the third half-life, how much of the sample is left?

Comments

Add Your Review

Your email address will not be published.

Subscribe to Newsletter!

Subscribe to get latest updates and information.