Across
- 2. 8th element
- 3. 4th element
- 5. 17th element
- 7. 7th element
- 9. 13th element
- 10. 11th element
- 12. 1st element
- 14. 15th element
- 16. 20th element
- 17. 3rd element
Down
- 1. 2nd element
- 3. 5th element
- 4. 14th element
- 6. 10th element
- 8. 9th element
- 9. 18th element
- 11. 12th element
- 13. 19th element
- 15. 16th element
- 16. 6th element