chemistry crossword puzzle

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Across
  1. 2. 2 protons 2 neutrons, with a 2+ charge
  2. 3. Rays and particles
  3. 4. number of waves that pass a given point per second
  4. 5. high speed electron
  5. 8. type of radiation emitted from nuclei
  6. 9. form of energy exhib-iting wavelike behavior
  7. 10. type of equation
Down
  1. 1. set of frequencies of electromagnetic waves
  2. 6. particle of electromagnetic radiation with no mass
  3. 7. unstable atomic nucleus loses energy by radiation.
  4. 11. minimum amount of energy that can be gained or lost by an atom