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Unit 8: Nuclear Change
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fission : the process by which a nucleus splits into two or more fragments and releases neutrons and energy
fusion : the process in which light nuclei combine at extremely high temperatures, forming heavier nuclei and releasing energy
nuclear chain reaction : a continuous series of nuclear fission reactions
gamma ray : the high-energy photon emitted by a nucleus during fission and radioactive decay
background radiation : the nuclear radiation that arises naturally from cosmic rays and from radioactive isotopes in the soil and air
nuclear radiation : the particles that are released from the nucleus during radioactive decay, such as neutrons, electrons, and photons
radioactive decay : the disintegration of an unstable atomic nucleus into one or more different nuclides, accompanied by the emission of radiation, the nuclear capture or ejection of electrons, or fission
half life : the time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope
beta particle : an electron or positron that is emitted from a nucleus during radioactive decay
alpha particle : a positively charged atom that is released in the disintegration of radioactive elements and that consists of two protons and two neutrons
radioactive tracer : a radioactive material that is added to a substance so that its distribution can be detected later
Unit 8: Nuclear Change
Across:1. | a continuous series of nuclear fission reactions | 3. | a positively charged atom that is released in the disintegration of radioactive elements and that consists of two protons and two neutrons | 5. | the process in which light nuclei combine at extremely high temperatures, forming heavier nuclei and releasing energy | 6. | an electron or positron that is emitted from a nucleus during radioactive decay | 7. | the high-energy photon emitted by a nucleus during fission and radioactive decay | 8. | the process by which a nucleus splits into two or more fragments and releases neutrons and energy | 9. | a radioactive material that is added to a substance so that its distribution can be detected later | 10. | the disintegration of an unstable atomic nucleus into one or more different nuclides, accompanied by the emission of radiation, the nuclear capture or ejection of electrons, or fission |
| | Down:2. | the particles that are released from the nucleus during radioactive decay, such as neutrons, electrons, and photons | 4. | the time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope | 6. | the nuclear radiation that arises naturally from cosmic rays and from radioactive isotopes in the soil and air |
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© 2014
PuzzleFast.com, Noncommercial Use Only
Unit 8: Nuclear Change
Across:1. | a continuous series of nuclear fission reactions | 3. | a positively charged atom that is released in the disintegration of radioactive elements and that consists of two protons and two neutrons | 5. | the process in which light nuclei combine at extremely high temperatures, forming heavier nuclei and releasing energy | 6. | an electron or positron that is emitted from a nucleus during radioactive decay | 7. | the high-energy photon emitted by a nucleus during fission and radioactive decay | 8. | the process by which a nucleus splits into two or more fragments and releases neutrons and energy | 9. | a radioactive material that is added to a substance so that its distribution can be detected later | 10. | the disintegration of an unstable atomic nucleus into one or more different nuclides, accompanied by the emission of radiation, the nuclear capture or ejection of electrons, or fission |
| | Down:2. | the particles that are released from the nucleus during radioactive decay, such as neutrons, electrons, and photons | 4. | the time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope | 6. | the nuclear radiation that arises naturally from cosmic rays and from radioactive isotopes in the soil and air |
| |
© 2014
PuzzleFast.com, Noncommercial Use Only