Across
- 5. perchloric
- 12. oxalic
- 16. periodic
- 17. carbonic
- 18. idos
- 19. cyanic
Down
- 1. nitric
- 2. chloric
- 3. chromic
- 4. sulfrufours
- 5. permanganic
- 6. sulfuric
- 7. hypochros
- 8. metaboric
- 9. bromic
- 10. metaphric
- 11. iodic
- 13. nitros
- 14. formic
- 15. chrlous