Chemical elements crossword puzzle

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Across
  1. 3. A metal used for jewelry & precious decorative pieces
  2. 4. A flammable & explosive gas
  3. 6. K-Found in fertilizers
  4. 9. A metal used for electric wires, pots, pans, & pennies
  5. 10. Used to make sulfuric acid & some medicines such as pet powders
  6. 14. Used on cuts & wounds to kill germs
  7. 15. Al-A light metal used in making airplanes, buildings, pots & pans, etc.
  8. 18. Ne-A gas used in many lights & signs
  9. 19. Cl-Used in bleach, in chemicals to kill germs in swimming pools, & found with the element sodium in table salt
  10. 20. Zn-A metal that prevents rust & is used in dry cell batteries
Down
  1. 1. The main gas in the air, also used in fertilizers
  2. 2. Na-Soft metal that combines with chlorine to make table salt
  3. 5. Ca-A soft, metallic chemical element found in limestone, marble, chalk, etc.
  4. 7. A gas necessary for respiration; aids burning
  5. 8. Ag-Used in tableware, jewelry, photography, medicines, & coins
  6. 9. Found in coal, oil gas, living things, & inks
  7. 10. Si-Used in electronics & in compounds for making glass
  8. 11. Pb-A metal used in automobile batteries & in fishing & diving weights
  9. 12. Ni-A metal used in coins
  10. 13. A heavy, poisonous liquid used in some thermometers
  11. 16. A strong metal used in the construction of buildings, steel, & machines
  12. 17. A gas much lighter than air used in blimps & balloons