First 20 Elements

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123456789101112131415161718
Across
  1. 3. atomic number: 7
  2. 6. atomic number: 14
  3. 9. atomic number: 11
  4. 13. atomic number: 5
  5. 14. atomic number: 18
  6. 15. atomic number: 12
  7. 16. atomic number: 6
  8. 17. atomic number: 2
  9. 18. atomic number: 4
Down
  1. 1. atomic number:9
  2. 2. atomic number: 19
  3. 4. atomic number: 16
  4. 5. atomic number: 20
  5. 7. atomic number: 8
  6. 8. atomic number: 15
  7. 10. atomic number: 3
  8. 11. atomic number: 17
  9. 12. atomic number: 10
  10. 14. atomic number: 13
  11. 17. atomic number: 1