Atomic Theory Crossword Puzzle

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Across
  1. 2. State electrons are in when they are in their lowest energy levels.
  2. 3. Shape of a p orbital
  3. 4. The overall charge of an atom.
  4. 7. The __________ number is the number of protons.
  5. 8. Element with electron configuration [Ar] 4s2 3d8
  6. 9. A particle of light.
  7. 13. Subatomic particle with no charge.
  8. 14. Frequency and energy are ________ proportional.
  9. 17. Tiny, dense, positive core of an atom.
  10. 19. A 3-D region with a high probability of electrons.
  11. 21. The atomic mass of an element is this type of average.
  12. 23. These electrons are in the outer most energy level.
  13. 24. Bohr's model has electrons in different energy ________.
  14. 25. Discovered the nucleus.
  15. 27. Discovered electrons.
Down
  1. 1. Positive subatomic particle.
  2. 3. He thought all atoms of an element were identical.
  3. 5. Subatomic particle with negligible mass.
  4. 6. Color of visible light with the highest energy.
  5. 10. Element with 56 protons.
  6. 11. First person to suggest that matter is made of atoms.
  7. 12. Frequency and wavelength are __________ proportional.
  8. 15. Element with electron configuration 1s2 2s2 2p6 3s2 3p5.
  9. 16. This number is the sum of the protons and neutrons.
  10. 18. Shape of an s orbital.
  11. 20. Atoms of the same element with different numbers of neutrons.
  12. 22. EM radiation with the highest frequency.
  13. 26. Type of EM radiation that has the longest wavelength.