Atomic and Electron Structure

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Across
  1. 1. has the electron configuration 2,8,8,1
  2. 3. has the electron configuration 2,8,4
  3. 7. only element with no neutrons
  4. 10. has 12 protons
  5. 11. a horizontal row of the periodic table
  6. 12. has 5 electrons
  7. 14. has 10 neutrons and one less proton
  8. 16. has 3 electrons
  9. 17. Element in period 4, group 2
  10. 18. Positively charged subatomic particle
  11. 19. subatomic particle with no charge
Down
  1. 1. has electron configuration 2,8,5
  2. 2. has the electronic configuration 2,8,3
  3. 4. Element in group 4, period 2
  4. 5. has 18 protons and 22 neutrons
  5. 6. has the electron configuration 2,5
  6. 8. the central part of an atom
  7. 9. has 5 neutrons
  8. 13. a vertical column of the periodic table
  9. 15. Negatively charged subatomic particle