WORD SPIRAL

Starting from 1, fill in the grid clockwise with four-letter words. The last letter of each word becomes the first letter of the next to reveal a chemical element. 1. Untidy state

2. A pace

3. Composition in verse 4. Thaw

5. Carpet nail

6. Sort

7. Child's toy

8. Quiet spell 9. Mass of bread

10. Married German

woman

11. Second-hand

12. Prima donna

13. Among

14. Twofold

15. Very long car

16. Sworn declaration