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1. Carbon-12 and Carbon-14 have a different number of

Isotopes. 1. Carbon-12 and Carbon-14 have a different number of . Protons Neutrons Both Neither . Radioactive Isotopes. 2. Which statement is true about an isotope’s half life?. Isotopes of the same element will have the same half life.

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1. Carbon-12 and Carbon-14 have a different number of

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  1. Isotopes 1. Carbon-12 and Carbon-14 have a different number of • Protons • Neutrons • Both • Neither

  2. Radioactive Isotopes 2. Which statement is true about an isotope’s half life? • Isotopes of the same element will have the same half life. • The longer a half life, the less stable an isotope is. • An isotope’s half life cannot be changed. • All of the above.

  3. Radioactive Decay 3. When an isotope undergoes fission, • Energy is released. • Another isotope is produced. • Particles are released. • All of the above.

  4. Radioactive Decay 4. 700 curies of Strontium-89 was released from the Hanford plant. It has a half life of 50 days. How many days later will it be after 2 half-lives have elapsed? • 100 days • 175 days • 350 days • 700 days • 1400 days

  5. Radioactive Decay 5. 700 curies of Strontium-89 was released from the Hanford plant. It has a half life of 50 days. How many curies of Sr-89 will be left after 2 half-lives? • 0 curies • 100 curies • 175 curies • 350 curies • 700 curies

  6. 6. When a neutron decomposes into a proton and an emitted electron which type of radiation is occurring? • Alpha • Beta • Gamma • Positron

  7. 7. A particle emitted during nuclear decay that consists of 2 protons and 2 neutrons (a helium nucleus) is a • Alpha particle • Beta particle • Gamma ray • Positron

  8. 8. Which of the following types of radioactive decay will change the isotope from one element to another? • Alpha • Beta • Gamma • Both A and B • A, B and C

  9. 9. Which of the following types of radioactive decay will decrease the mass of the isotope? • Alpha • Beta • Gamma • Both A and B • A, B and C

  10. Alpha decay decreases the atomic number by 2, because the alpha particle includes two protons. The mass decreases by 4 since the particle also contains to neutrons. Beta-plus decay decreases the atomic number by one since a proton is split into a neutron and a positron. The mass does not change since the particle released does not contain significant mass.

  11. Beta minus decay INCREASES the atomic number by one since a neutron is split into a proton and an electron. The mass does not change since the electron that is released does not have significant mass. Gamma radiation does not change the atomic number or the mass of an atom.

  12. 10. Which of the following is not a type of ionizing radiation? • Gamma Waves • X-Ray • Radio Waves • Ultra-violet Waves

  13. Review of Inverse and Direct Relationships Inverse relationship One factor increases, the other decreases. Example: Pressure varies inversely with volume. Direct relationship Both increase together (or decrease together). Example: Pressure varies directly with temperature.

  14. 11. The wavelength of a wave varies _______ with frequency and _____ with energy. • Inversely; directly • Directly; inversely • Directly with both • Inversely with both

  15. Increasing frequency

  16. 12. In a nuclear reactor, water is used to • Generate steam to produce electricity. • Cool the reactor core. • Both A and B. • Neither A nor B

  17. 13. The country that gets the highest percentage of their electricity from nuclear is • The United States • Japan • France • China

  18. 14. The country that generates the most nuclear energy is • The United States • Japan • France • China

  19. 15. Which act limits liability to nuclear energy companies for accidents? • Nuclear Waste Policy Act • Nuclear Accident Insurance Act. • Price Anderson Act • Truman Nuclear Policy Act

  20. 16. The only significant nuclear power plant accident the United States happened in • Pennsylvania • Washington • Virginia • Nevada

  21. 17. The cause of the nuclear accident at Three Mile Island was • An explosion in one of the reactor cores. • Loss of coolant to one of the reactor cores. • Accidental discharge of radioactive water into the local river. • All of the above.

  22. 18. The Chernobyl nuclear accident happened in • Sweden • Russia • Ukraine • Slovakia

  23. 19. Currently, high level nuclear waste is stored • At Yucca Mountain. • In government-run landfills. • At each nuclear reactor site. • All of the above.

  24. 20. Which of the following is not a disadvantage to nuclear power? • Low fuel supply • Lack of location for storage of waste • Potential for catastrophic accidents • High cost

  25. Uranium Reserves

  26. B C D A C B A D A C D C C A C A B C C A

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