PS.Chem.1.2

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Across
  1. 5. The number of wave cycles in a second.
  2. 7. The average weight of all an elements isotopes.
  3. 9. An Ion with a positive charge
  4. 10. A subatomic particle with a positive charge
  5. 12. Energy released by an atom becoming excited and then relaxing
  6. 13. The man who suggested everything is made of invisible spheres of different shapes.
  7. 16. A chart that shows all the elements
Down
  1. 1. A subatomic particle with a negative charge
  2. 2. A core made of Protons and electrons
  3. 3. Radiation that releases energy without changing the atom
  4. 4. The distance between waves in electromagnetic radiation.
  5. 6. A subatomic particle with no charge
  6. 8. A radiation particle that is Helium with 2 neutrons
  7. 11. Am atomic model that displays the amount of electrons
  8. 14. An Ion with a negative charge
  9. 15. An atom with a positive or negative charge