Holt Physical Science Chapter 9: Nuclear Changes 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!

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Question 1 1. What are the three types of radiation?

Question 2 2. Which of the following is NOT a source of background radiation?

Question 3 3. 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 4 4. Which of the following is true about radioactive materials?

Question 5 5. Major sources of radiation include all of the following EXCEPT

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Question 6 6. What is the difference between carbon-13 and carbon-14?

Question 7 7. Despite human skin providing protection against alpha particles, why is it dangerous to ingest alpha particles?

Question 8 8. What is the greatest source of background radiation for most humans (NOT the USA)?

Question 9 9. 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 10 10. Which of the following can be shielded by a piece of paper?

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Question 11 11. Is all background radiation dangerous?

Question 12 12. A sample of thulium-171 has a mass of 0.4055 grams. How much is left after 6 half-lives?

Question 13 13. 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 14 14. Two artifacts have recently been discovered. After testing, it is found that Artifact A has 20% of carbon-14 in it, while Artifact B has 35% of carbon-14 in it. Which of the two artifacts is the OLDEST?

Question 15 15. Isotopes are

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Question 16 16. 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 17 17. Carbon-10 has a half-life of about 19 seconds. How many half-lives does it undergo in 2 minutes and 32 seconds?

Question 18 18. Which of the following statements is NOT true regarding the process of nuclear fusion?

Question 19 19. Which of the following has no mass and does not change the composition of the nucleus?

Question 20 20. Which of the following has a mass of 1 and an atomic number of 1?

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Question 21 21. 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 22 22. Which of these would NOT affect how much background radiation you received?

Question 23 23. If a substance has a half-life of 5 years, then how much of the initial sample remains after 15 years?

Question 24 24. What is the maximum safe dose of ionizing radiation per year?

Question 25 25. Which of the following is really just a high-energy electron?

Holt Physical Science Chapter 9: Nuclear Changes 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!

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