Holt McDougal Modern Chemistry Chapter 21: Nuclear Chemistry Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. Cobalt-57 has a half-life of about 272 days. If a sample has an initial mass of 2.24 grams and undergoes decay until it has a mass of 0.140 grams, then how many half-lives passed?

Question 2 2. Which of the following is Yucca Mountain in Nevada known for?

Question 3 3. Radiometric dating is a method used to date rocks based on what?

Question 4 4. Carbon-10 has a half-life of about 19 seconds. How many half-lives does it undergo in 2 minutes and 32 seconds?

Question 5 5. Which particles are present in the nucleus of an atom?

Page 2

Question 6 6. Which of the following is really just a high-energy electron?

Question 7 7. Which of the following statements is NOT true regarding the process of nuclear fusion?

Question 8 8. Rochelle has been experiencing fatigue, depression, and has had difficulty concentrating. Her physician believes she has an underperforming thyroid and wants to run some tests. Iodine-131 will be used to study the activity of Rochelle's thyroid. This substance is an example of _____.

Question 9 9. A large nucleus may get to a more stable state by emitting two protons and two neutrons. This describes which type of radioactive decay?

Question 10 10. Which of the following types of radioactive decay does not result in a change in the number of protons and neutrons within a nucleus, but does release a lot of energy?

Page 3

Question 11 11. Why is it difficult to dispose of radioactive waste?

Question 12 12. Which of the following terms describes an illness caused by exposure to a large dose of radiation over a short period of time?

Question 13 13. If a substance has a half-life of 5 years, then how much of the initial sample remains after 15 years?

Question 14 14. Which of the following has no mass and does not change the composition of the nucleus?

Question 15 15. The charges on beta particles (Β - ), alpha particles (α) and gamma (γ) rays are _____ respectively.

Page 4

Question 16 16. When does nuclear fusion occur?

Question 17 17. Becky was recently diagnosed with an aggressive brain tumor. Her oncologist recommended treating the tumor with cobalt-60 due to its precision with treating this type of cancer. This substance is being used for _____.

Question 18 18. If a parent nucleus is feeling unstable because the ratio of neutrons to protons is too great, it might undergo a type of radioactive decay which results in the neutron emitting an electron (a beta particle) from the nucleus and turning into a proton. This describes what type of radioactive decay?

Question 19 19. The type of nuclear power that occurs when a heavier atom splits into smaller pieces, which is the most common on Earth is known as _____.

Question 20 20. During a nuclear reaction, mass is lost. Which of the following does this result in?

Page 5

Question 21 21. Despite human skin providing protection against alpha particles, why is it dangerous to ingest alpha particles?

Question 22 22. How does a nuclear reaction differ from a chemical reaction?

Question 23 23. Which of the following can be shielded by a piece of paper?

Question 24 24. A 6.95 gram sample of radioactive nobelium-259 has a half-life of 58 min. How much is left after 2 hours and 54 minutes?

Question 25 25. What is the term used to describe an accident that involves severe overheating of the nuclear reactor?

Page 6

Question 26 26. What is the energy required to break a nucleus into its individual nucleons called?

Question 27 27. A sample of thulium-171 has a mass of 0.4055 grams. How much is left after 6 half-lives?

Question 28 28. Why is nuclear power thought to be a 'climate friendly' form of energy?

Question 29 29. The equation E = mc2 shows that a small amount of mass creates _____.

Question 30 30. The difference between the mass of the nucleus and the sum of each individual nucleon is:

Holt McDougal Modern Chemistry Chapter 21: Nuclear Chemistry Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Holt McDougal Modern Chemistry: Online Textbook Help  /  Science Courses
Support