Polyatomic Craziness

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Across
  1. 4. AsO4
  2. 7. ClO
  3. 11. ClO2
  4. 14. CO3
  5. 15. ClO4
  6. 18. CrO4
  7. 22. a Mars rover that landed in 1997
  8. 23. Cr2O7
  9. 24. baseball team from New York
  10. 27. SCN
  11. 30. borate's charge is negative "?"
  12. 31. MnO4
  13. 32. C2O4
Down
  1. 1. a Post Malone song
  2. 2. the rank between captain and colonel
  3. 3. NO3
  4. 4. C2H3O2
  5. 5. blended food (think baby food)
  6. 6. ClO3
  7. 8. PO3
  8. 9. snowman that came to life
  9. 10. PO4
  10. 12. the groundskeeper in Harry Potter
  11. 13. sleeping beauty's real name
  12. 15. O2
  13. 16. S2O3
  14. 17. the loudest football field is in this city
  15. 19. SO3
  16. 20. the month in which Pi Day is celebrated
  17. 21. OH
  18. 25. NO2
  19. 26. the city Aleppo is located in this country
  20. 28. BrO3
  21. 29. CN