The Nitrogen Cycle · Air Becomes Life
unseel.com · fixation · nitrification · denitrification
N≡N bond 945 kJ/mol
Range −3 → +5
stage
N₂ gas (0)
NH₃ · fixation (−3)
NO₂⁻ / NO₃⁻ (+3/+5)
denitrification → N₂
Earth · biosphere
Unseel.com · The Nitrogen Cycle