Periodic Table Crossword

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Across
  1. 3. Determines an element,positive charge
  2. 4. Vertical rows on the periodic table
  3. 6. Second most common element in humans
  4. 7. Everything that makes up the universe
  5. 9. Most common state of mater for non-metals
  6. 11. Has 3 electrons
  7. 13. NaCl
  8. 14. The gases on the 18th group
  9. 16. Element named after the creator of the periodic table
  10. 19. Has a neutral charge
  11. 20. Has 6 protons
Down
  1. 1. 2 or more elements chemically combined
  2. 2. Any metal in the first group
  3. 5. CO2
  4. 8. Humans need it to breathe
  5. 10. The last name of our science teacher
  6. 12. H2O
  7. 15. Can change the charge of an atom negatively
  8. 17. Horizontal rows on the periodic table
  9. 18. most common type of atom