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