Nuclear Chemistry

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Across
  1. 4. combining of atomic nuclei; releases large amounts of energy
  2. 7. made of an electron
  3. 9. a process by which unstable radioactive atoms lose energy through radiation
  4. 11. releases energy does not change the mass number or atomic number
  5. 13. made of energy; has no mass
  6. 14. splitting of a nucleus into fragments
Down
  1. 1. isotopes of atoms with unstable nuclei
  2. 2. time required for one-half of a radioisotope's nuclei to decay
  3. 3. increases the atomic number by 1
  4. 5. Reactions involving a change to an atom's nucleus
  5. 6. rays and particles emitted by radioactive material
  6. 8. decreases the mass number by 4 and the atomic number by 2
  7. 10. made of 2 protons and 2 neutrons
  8. 12. substances that spontaneously emit radiation