Head Scratcher

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Across
  1. 4. Transparent glass which guards from U.V rays.
  2. 5. Element added to wine barrels to displace air.
  3. 8. Planet to which superman belongs.
  4. 10. Chlorine does this to damp litmus paper.
  5. 11. Anagram of "storming Teeth" and is related to "POLYMER".
  6. 13. Element that stay in a glass vessel but doesnt wet it.
  7. 14. Borane which resembles with spider web.
  8. 16. Compound used by philosophers as wool.
  9. 18. Element abundant in green leafy vegetables.
Down
  1. 1. Glass resistant to heat which rhymes with T.'rex'.
  2. 2. Polymer used in Bulletproof vest.
  3. 3. Oil of mirbane.
  4. 5. Element widely used in aerospace.
  5. 6. Compound with windowpane structure.
  6. 7. Jester's Gold.
  7. 9. I help to ripen fruits.
  8. 11. One of the main component of universal indicator.
  9. 12. Element frequently found near volcanoes.
  10. 15. Element with oxidation state 0 to +8.
  11. 17. Crime series behind barium bromide.