periodic table

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Across
  1. 2. commonly used to wrap food
  2. 4. named after a country
  3. 8. used in jewelry
  4. 9. used to clean pools
  5. 11. alkali metal
  6. 12. we need it to live
Down
  1. 1. good for your bones
  2. 3. first element
  3. 5. most chemically reactive element
  4. 6. very valuable
  5. 7. used to blow up balloons
  6. 9. most common element in the universe
  7. 10. was originally called Ferrum