Science cross word puzzle

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Across
  1. 2. is commonly used to treat cancer.
  2. 5. highly toxic in its inorganic form
  3. 8. synonymous names for the chemical element with atomic number 41
  4. 11. vacuum tubes, high-voltage indicators, lightning arresters, wavemeter tubes, television tubes, and helium–neon lasers.
  5. 12. He or she would still need to breathe .... from a portable tank.
  6. 15. an odorless, invisible, radioactive gas naturally released from rocks, soil, and water
  7. 16. an essential mineral, is naturally present in some foods, added to others
  8. 17. 9-digit number, beginning with the number "9", formatted like an SSN
  9. 18. a chemical element with the symbol F and atomic number 9
  10. 19. the chemical element of atomic number 19
Down
  1. 1. the chemical element of atomic number 5, a nonmetallic solid.
  2. 3. a naturally occurring radioactive metal.
  3. 4. chemical element with symbol N and atomic number 7.
  4. 6. an element that exists in nature and can be found in soil, plants, foods, and water.
  5. 7. the chemical element of atomic number 6
  6. 9. a mineral that the body needs for growth and development.
  7. 10. First use some ..... to disinfect the wound.
  8. 13. a silver-white hard malleable ductile metallic element capable of a high polish and resistant to corrosion that is used chiefly in alloys and as a catalyst.
  9. 14. silvery radioactive metallic element
  10. 20. a precious shiny grayish-white metal, the chemical element of atomic number 47.