Atomic Theory Crossword

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Across
  1. 2. This person discovered energy levels
  2. 4. This person discovered the nucleus
  3. 6. What you get when you add the neutrons and protons
  4. 10. How many protons are in a nucleus
  5. 11. A ______has a neutral charge
  6. 12. An abbreviation of an element
  7. 13. A ______ has a negative charge
  8. 14. An electron has a _______ charge
  9. 15. A ______ has a positive charge
Down
  1. 1. This person has the most developed theory of atoms
  2. 3. The _____ is where the protons and neutrons are located
  3. 5. A theory of the nature of matter
  4. 7. This person discovered that atoms contain negatively charge particles
  5. 8. The protons, neutrons, and electrons are located inside of the...
  6. 9. This person developed the electron cloud model