nitrogen
Most breathed gas
Nitrogen is a colorless, odorless gas that makes up about 78 percent of Earth's atmosphere.
It is essential to life—a key component of proteins and DNA—yet most organisms cannot use atmospheric nitrogen directly; it must be "fixed" into compounds like ammonia.
Nitrogen fertilizers have transformed modern agriculture.
In liquid form, nitrogen is used as a coolant for its extremely low temperature.
Occurring at intervals
- atomicOf elemental particles
- protonsPositive nuclear particles
- electronsNegative charges in atoms
- neutronsUncharged subatomic particles
nonmetal · gas · valence · isotopes · N2 · chemical · elemental · compounds
Acrid nitrogen-hydrogen gas
- ureaNitrogenous metabolic waste compound
- crop yieldAgricultural production amount
- agricultureCultivation of land, livestock
- soilGround matter for planting
nutrients · growth · harvest · manure · compost · ammonium · legumes · NPK
Organic compounds forming proteins
- proteinsAmino acid polymers
- nucleotidesDNA and RNA subunits
- DNAHereditary code molecule
- RNAGene expression molecule
enzymes · chlorophyll · metabolism · biosynthesis · adenine · guanine · cytosine · thymine
Gaseous envelope surrounding Earth
- troposphereLowest atmospheric layer
- stratosphereSecond atmospheric layer up
- mesosphereAtmospheric layer, 50-85km up
- oxygenElement eight, colorless gas
climate · ozone · pressure · altitude · exosphere · barometer · atmospheric · partial pressure
Element eight, colorless gas
- argonUnreactive element eighteen
- heliumLightest noble gas
- hydrogenSimplest atomic element
- methaneSimplest alkane fuel
ammonia · neon · carbon dioxide · laughing gas · compressed gas
Ultralow temperature science
- refrigerantHeat-transfer medium
- cryopreservationLow-temperature biological preservation
- cryotherapyTreatment using extreme cold
- freezingExtremely cold
supercooling · cryostat · cryogenic · subzero · flash freezing · cryosurgery · cold storage · boiling point
Nonreactive elemental group
- nonreactiveChemically inactive substance
- blanketingCovering something entirely
- preservationMaintaining something's condition
- food packagingMaterials enclosing consumables
fire suppression · purging · wine preservation · chip bags · tire inflation · laser cutting
periodic
Occurring at intervals
neutrons · nonmetal · gas · valence · isotopes · N2 · chemical · elemental · compounds · bonding
ammonia
Acrid nitrogen-hydrogen gas
- ureaNitrogenous metabolic waste compound
- crop yieldAgricultural production amount
- agricultureCultivation of land, livestock
soil · nutrients · growth · harvest · manure · compost · ammonium · legumes · NPK · synthetic fertilizer
amino acids
Organic compounds forming proteins
- proteinsAmino acid polymers
- nucleotidesDNA and RNA subunits
- DNAHereditary code molecule
RNA · enzymes · chlorophyll · metabolism · biosynthesis · adenine · guanine · cytosine · thymine · peptides
air
Gaseous envelope surrounding Earth
- troposphereLowest atmospheric layer
- stratosphereSecond atmospheric layer up
- mesosphereAtmospheric layer, 50-85km up
oxygen · climate · ozone · pressure · altitude · exosphere · barometer · atmospheric · partial pressure · composition
oxygen
Element eight, colorless gas
methane · ammonia · neon · carbon dioxide · laughing gas · compressed gas
cryogenics
Ultralow temperature science
- refrigerantHeat-transfer medium
- cryopreservationLow-temperature biological preservation
- cryotherapyTreatment using extreme cold
freezing · supercooling · cryostat · cryogenic · subzero · flash freezing · cryosurgery · cold storage · boiling point · cryonics
noble gases
Nonreactive elemental group
- nonreactiveChemically inactive substance
- blanketingCovering something entirely
- preservationMaintaining something's condition
food packaging · fire suppression · purging · wine preservation · chip bags · tire inflation · laser cutting
- chemicalschemicals, compounds, acids, reagents, solutions
- gasesgas, air, oxygen, helium, hydrogen
- periodic tableperiodic table, elements, hydrogen, helium, carbon
- plant carewatering, fertilizing, fertilizer, pruning, transplanting
- Substancesmatter, elements, compounds, molecules, atoms
- elementsoxygen, hydrogen, carbon, helium, gold
nitrogenoxygen
Element eight, colorless gas
O2 · carbon dioxide · water vapor · argon
nitrogenfluorine
Pale yellow halogen gas
oxygen · chlorine · halogens · alkali metals
- nitrogen fertilizerNutrient compound for crops
- liquid nitrogenCryogenic form of air's main component
- nitrogen cycleBiogeochemical element circulation
- nitrogen base
- nitrogen gasInert atmospheric element
- blood urea nitrogenWaste product measuring kidney function
nitrogen mustard, nitroglycerin, nitrogenous, nitrogen cycle, nitroglycerine, nitrogen-fixing