Periodic Table Crossword Puzzle

Edit Answers
1234567891011121314151617181920
Across
  1. 3. Only nonmetal in the left side of the periodic table.
  2. 7. Tells us the number of protons an element has.
  3. 9. Maker of the first periodic table.
  4. 11. The most reactive metals.
  5. 13. Have 5 valence electrons.
  6. 14. Vertical columns in the periodic table.
  7. 18. Are never found uncombined in nature.
  8. 19. Have properties of both nonmetals and metals.
  9. 20. Have 6 valence electrons.
Down
  1. 1. Have 7 valence electrons.
  2. 2. Have 3 valence electrons.
  3. 4. The initials of an element.
  4. 5. Makes up most of the periodic table.
  5. 6. Consist of families 3-12 on the periodic table.
  6. 8. Have 8 valence electrons.
  7. 10. Poor conductors of heat and electricity.
  8. 12. Maker of the modern periodic table.
  9. 15. Electrons in the outermost energy level.
  10. 16. Is used to organize the elements in the periodic table.
  11. 17. Have 4 valence electrons.