Chemistry Crossword

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Across
  1. 1. electrons located on the outermost energy level
  2. 3. discovered atom was a solid indivisible mass
  3. 6. lowest energy level
  4. 7. 7 valence electrons
  5. 8. levels electrons located around the nucleus
  6. 11. group 1 period 4
  7. 12. atomic symbol Cu
  8. 13. used math to describe location and energy of an atom
  9. 15. s=1, p=3, d=5, f=7
  10. 16. atoms that gained energy in higher energy shells
  11. 18. SI unit of frequency
  12. 19. [Ne] 3s^1
  13. 20. amount of energy required to move one electron to another energy level
Down
  1. 2. 1s^2 2s^2 2p^3
  2. 4. described atoms as having a nucleus surrounded by an electron cloud
  3. 5. atomic number 2
  4. 9. 35 protons and electrons
  5. 10. v=C/λ
  6. 11. separates colors of light
  7. 14. columns of the periodic table
  8. 17. quantum of light energy