3.4 - Unstable Nuclei and Radioactive Decay

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Across
  1. 4. the process by which unstable nuclei lose energy by emitting radiation in a spontaneous process
  2. 8. an equation detailing the atomic number and mass numbers of particles involved in radioactive decay
  3. 10. a fast moving electron with a (1-) charge emitted during radioactive decay
  4. 11. rays and particles emitted by radioactive materials
Down
  1. 1. radiation deflected toward a negatively charged plate in a magnetic field
  2. 2. the process in which substances spontaneously emit radiation
  3. 3. a pure substance that cannot be broken down into simpler substances by physical or chemical means
  4. 5. a reaction in which the atom of one element changes into the atom of another element
  5. 6. high-energy radiation that possesses no mass and is not deflected by electric or magnetic fields
  6. 7. radiation deflected toward a positively charged plate in a magnetic field
  7. 9. a particle with two protons and two neutrons with a (2+) charge emitted during radioactive decay