Nuclear Chemistry Vocab

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Across
  1. 3. a subatomic particle theorized to be among the basic units of matter
  2. 5. a nuclear reaction in which the nuclei of 2 atoms combine to form a larger nucleus
  3. 6. elements with an atomic number greater than 92
  4. 7. a state of matter in which atoms have been stripped of their electrons
  5. 8. the smallest possible mass of a fissionable material that can sustain a chemical reaction
  6. 11. a penetrating form of radiation emitted by an unstable nucleus
  7. 12. a series of fission reactions triggered by neutrons released during the fission of a nucleus
  8. 13. a nuclear reaction in which an atomic nucleus is split into 2 smaller particles
  9. 15. nuclear radiation that occurs naturally in the environment
  10. 16. the time required for one half of a sample of a radioactive isotope to decay
  11. 17. an electron emitted by an unstable nucleus
Down
  1. 1. a positively charged particle, emitted by certain radioactive nuclei, made up of 2 protons & 2 neutrons; a helium nucleus
  2. 2. conversion of a one element to another element through a nuclear reaction
  3. 4. charged particles & electromagnetic waves that are emitted from the nuclei of radioisotopes
  4. 9. an isotope with an unstable nucleus
  5. 10. powerful attractive force that binds protons & neutrons together in the nucleus
  6. 14. the process in which an unstable atomic nucleus emits charged particles & energy