The First 18 Elements - What Element Am I?

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Across
  1. 3. My atomic mass is 16.
  2. 5. My atomic number is 15.
  3. 6. My atomic symbol is C.
  4. 7. My atomic number is 1.
  5. 10. I have 7 neutrons.
  6. 11. My atomic number is 12.
  7. 12. I have 3 electrons
  8. 14. I have 14 protons.
  9. 16. I have 14 neutrons.
  10. 17. My atomic mass is 40.
Down
  1. 1. I have 5 electrons.
  2. 2. I have 9 protons.
  3. 4. My atomic symbol is Cl.
  4. 7. My atomic mass is 4.
  5. 8. I have 10 electrons.
  6. 9. My atomic symbol is Be.
  7. 13. My atomic symbol is Na.
  8. 15. My atomic symbol is S.