3.4 Unstable Nuclei and Radioactive Decay Crossword

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Across
  1. 2. a type of equation that shows the atomic number and mass number of the particles involved
  2. 4. a spontaneous process in which unstable nuclei lose energy by emitting radiation
  3. 6. a reaction that involves a change in the nucleus of an atom
  4. 8. a particle with two protons and two neutrons, with a 2+ charge; is equivalent to a helium-4 nucleus, can be represented by a; and is emitted during radioactive decay
  5. 9. the process in which some substances spontaneously emit radiation
  6. 10. radiation that is made up of beta particles; is deflected toward a positively charged plate when radiation from a radioactive source is directed between two electrically charged plates
Down
  1. 1. energy that comes from a source in the form of waves or particles
  2. 3. high-energy radiation that has no electrical charge and no mass, is not deflected by electric or magnetic fields, usually accompanies alpha and beta radiation, and accounts for most of the energy lost during radioactive decay
  3. 5. radiation that is made up of alpha particles; is deflected toward a negatively charged plate when radiation from a radioactive source is directed between two electrically charged plates
  4. 7. a high-speed electron with a 1- charge that is emitted during radioactive decay