Conners Crossword puzzle

1234567891011121314
Across
  1. 2. number the number of an element on the periodic table
  2. 3. total numbers of protons and neutrons
  3. 6. radiation being emitted
  4. 8. a subatomic particle with a positive electric charge
  5. 10. atoms are set apart which release energy
  6. 12. the mass of an element is different than the mass on the periodic table
  7. 13. interval of time required for one-half of the atomic nuclei of a radioactive sample to deca
  8. 14. a subatomic particle with no electric charge
Down
  1. 1. a layer of aluminum
  2. 4. stopped by the outer layers of the skin
  3. 5. the center of an atom
  4. 7. something happens causing something else to happen and just keeps happening
  5. 9. stopped by lead
  6. 11. two light nuclei merge to form a single heavier nucleus