Periodic Table

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1234567891011121314151617181920
Across
  1. 3. A unique element
  2. 7. Has no charge
  3. 9. Elements that are no metals
  4. 14. A noble gas with an h
  5. 15. Used to make water along with hydrogen
  6. 16. Elements that have some properties of metals and non metals
  7. 17. Has a positive charge
  8. 18. The first group of the periodic table is called
  9. 19. The last group of the table
  10. 20. The horizontal collums
Down
  1. 1. Has 5 protons
  2. 2. Has a negative charge
  3. 4. 2 or more different elements combined in a fixed ratio
  4. 5. Has the initial "K"
  5. 6. The vertical rows
  6. 8. A very reactive element that an "N"
  7. 10. The number that determines the identity of an element
  8. 11. Elements that are generally good conductors of heat and electricity
  9. 12. Used to find the number of neutrons in an atom
  10. 13. 2 or more of the same element