BioChem

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Across
  1. 2. Ne
  2. 7. Exit
  3. 9. Carbon
  4. 12. A challenge
  5. 15. 6.02x10 to the 23
  6. 16. S
  7. 18. J-Shaped curve
  8. 20. Au
Down
  1. 1. Protein
  2. 3. Big number on the periodic table
  3. 4. Negative
  4. 5. O
  5. 6. Xe
  6. 8. S-shaped curve
  7. 10. In
  8. 11. Block
  9. 13. Peanutbutter
  10. 14. Positive
  11. 17. Water
  12. 19. Neutral