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Atomic Structure and Components 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. Magnesium has three common isotopes. Based on its average atomic mass, which is the most common?

Question 2 2. 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 3 3. The equation E = mc2 shows that mass and energy are:

Question 4 4. What is the energy required to break a nucleus into its individual nucleons called?

Question 5 5. Iodine (I) has an average atomic mass of 126.90 and an atomic number of 53. Is _____I-129_____an isotope?

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Question 6 6. X and Y are elements that are isotopes to each other. Which of the following is true about X and Y?

Question 7 7. The atomic mass of hydrogen is:

Question 8 8. Which of the following has no mass and does not change the composition of the nucleus?

Question 9 9. Carbon-10 has a half-life of about 19 seconds. How many half-lives does it undergo in 2 minutes and 32 seconds?

Question 10 10. Which of the following has a mass of 1 and an atomic number of 1?

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Question 11 11. Which of the following is NOT the charge of a proton?

Question 12 12. The number of protons in an atom corresponds to what?

Question 13 13. The mass number indicates:

Question 14 14. Atomic mass is calculated by adding:

Question 15 15. 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 _____.

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Question 16 16. 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 17 17. If Argon is a noble gas and its atomic number is 18, how many electrons can be found in the valence level?

Question 18 18. 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 19 19. The average atomic mass or atomic weight found on the periodic table is _____.

Question 20 20.

If the isotope of an element has 17 protons and 19 neutrons, what is this element and what is its atomic mass?

Hint: the atomic number is the number of protons.

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Question 21 21. The equation E = mc2 shows that a small amount of mass creates _____.

Question 22 22. Protons are made of what?

Question 23 23. Which element has a mass number of 12 and contains 6 neutrons?

Question 24 24. The difference between the mass of the nucleus and the sum of each individual nucleon is:

Question 25 25. A sample of thulium-171 has a mass of 0.4055 grams. How much is left after 6 half-lives?

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Question 26 26. During a nuclear reaction, mass is lost. Which of the following does this result in?

Question 27 27. Which of the following statements is NOT true regarding the process of nuclear fusion?

Question 28 28. What is the maximum number of electrons that can occupy the 2s orbital?

Question 29 29. Which two are isotopes of one another?

Question 30 30. Which of the following are NOT found in the atomic nucleus?

Atomic Structure and Components 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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