What is the difference between nh3 and nh4?

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  1. #called
  2. #forms
  3. #exists
  4. #understand
  5. #toxic
  6. #first
  7. #sometimes
  8. #ammonia
  9. #aquarium
  10. #ammonium
  11. #between
  12. #difference
  13. #nontoxic
  14. #ionised