Periodic Table

12345678910
Across
  1. 4. 1st
  2. 6. 9th
  3. 7. 10th
  4. 9. 4th
  5. 10. 7th
Down
  1. 1. 8th
  2. 2. 5th
  3. 3. 2nd
  4. 5. 3rd
  5. 8. 6th