Brezi's Puzzle Gosh durnit

123456789101112131415161718
Across
  1. 4. charge of proton
  2. 8. indicates its period on the periodic table
  3. 9. the stable configuration of an atom
  4. 10. charge of electron
  5. 14. lowest energy level for the electron
  6. 15. atom with positive charge
  7. 18. nuetral particle in the nucleus
Down
  1. 1. charge of neutrons
  2. 2. this particle identifies the atom
  3. 3. The location of protons and neutrons
  4. 5. atom with negative charge
  5. 6. the location of electrons
  6. 7. building block of the universe
  7. 11. 2 forms of the same element with different masses
  8. 12. the particle that orbits the nucleus
  9. 13. measures the number of protons
  10. 16. electrons travel around these in the nucleus
  11. 17. Protons + neutrons