The Nitrogen Cycle ·
Air Becomes Life
un
seel
.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
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Un
seel
.com · The Nitrogen Cycle