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Across 1. Name for the NO₃⁻ anion (omit the brackets). 5. The oxidation state (plus/minus [number]) of nitrogen in R-NH₂. (2 Words) 7. Functional group containing nitrogen (and hydrogen). 8. Process by which atmospheric nitrogen is converted to ammonium. 10. Undergone in the formation of ammonium. 14. The nitrogenous 'currency' of living organisms. (2 Words) 17. Name for NO. (2 Words) 18. The name of the NH₃ molecule. 19. Name given to the -CONH- bond when between amino acids. 21. Process by which organic nitrogen is converted to ammonium. 22. A chain of linked amino acids. 23. Short chain of linked amino acids. 24. The oxidation state (plus/minus [number]) of nitrogen in NH₃. (2 Words) 25. The oxidation state (plus/minus [number]) of nitrogen in N₂. 26. Name for the NO₂⁻ anion (omit the brackets).

Down 1. Process by which ammonium ions are converted to nitrate ions. 2. The oxidation state (plus/minus [number]) of nitrogen in N₂O. (2 Words) 3. The name of the NH₄⁺ cation. 4. The name of the -CONH- functional group. 6. Macromolecular source of nitrogen. 9. Undergone in the formation of nitrates. 11. Name for N₂O. (2 Words) 12. The oxidation state (plus/minus [number]) of nitrogen in NO₂⁻. (2 Words) 13. Name for NO₂. (2 Words) 15. Process in which anaerobic bacteria reduce nitrate ions sequentially. 16. Nitrogenous excretory product. 20. The oxidation state (plus/minus [number]) of nitrogen in NO₃⁻. (2 Words)