Periodic table of elements crossword

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Across
  1. 5. chemical element used in making circuits
  2. 6. precious metal shiny grayish white
  3. 7. member of the halogen group, dark red toxic liquid
  4. 8. hard silver gray metal of the transition series
  5. 10. rare soft silvery reactive metal
  6. 12. nonmetal that has two forms (diamond and graphite)
  7. 14. the gas that all living things depend on for life
  8. 15. frequently mistaken for graphite in pencils
  9. 16. radioactive metal of the actinide series, isn't natural
  10. 18. lightest member of the noble gas series
  11. 19. member of the noble gas series, used in some electric lamps
Down
  1. 1. very unstable element
  2. 2. rare radioactive metal, formerly used as radiation
  3. 3. yellow precious metal used in jewelry
  4. 4. soft white reactive metal
  5. 5. one of the chemical elements found in salt
  6. 9. hard shiny metal used manufacturing in the form of steel
  7. 11. metallic element that occurs abundantly in nature
  8. 13. hard, silvery white metal, chemical element
  9. 17. produces violet vapor, black crystals, non metal