Elements

1234567891011121314151617
Across
  1. 3. has 47 protons
  2. 5. noble gas with 48 neutrons
  3. 7. mass of 1.008
  4. 9. metalloid in group 13
  5. 13. has a mass of about 39
  6. 15. has a charge of +2 and 3 energy levels
  7. 16. has 7 valence electrons and 5 energy levels
  8. 17. metalloid with 4 valence electrons
Down
  1. 1. nonmetal in group 14
  2. 2. nonmetal with a charge of -3
  3. 4. nonmetal with 5 valence electrons
  4. 6. has 27 protons
  5. 8. has a charge of +3 and 39 neutrons
  6. 10. has a charge of -2 and 4 energy levels
  7. 11. has 2 valence electrons and 6 energy levels
  8. 12. halogen with 4 energy levels
  9. 14. mass of about 75