Elements

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Across
  1. 3. starts with c ends with r has oppe in the middle
  2. 5. starts with c ends with t has obal in the middle
  3. 6. starts with I ends with m has ndiu in the middle
  4. 7. starts with n ends with l has icke in te middle
  5. 9. starts with I ends with n has ro in the middle
  6. 11. starts with h ends with m has assiu in the word
  7. 13. starts with n ends with n has eo in the middle
  8. 14. stars with a ends with c has rseni in the middle
  9. 15. starts with t ends with m has antalu in it
  10. 17. starts with a end with o had rgo in the middle
  11. 19. starts with h ends with m has eliu in the middle
Down
  1. 1. starts with a ends with m has ctiniu in it
  2. 2. starts with r ends with m has asiu in the middle
  3. 4. starts with c ends with m has uriu in the middle
  4. 5. starts with c ends with e has hlorine in it
  5. 8. with k ends with n has rypto in the word
  6. 10. starts with r ends with n has ado in the middle
  7. 12. starts with m ends with y has ercur in the word
  8. 16. starts with n sends with m has iobiu in the word
  9. 18. starts with t ends with m has erbium in the word