N2

N2 is the chemical formula for molecular nitrogen—two nitrogen atoms bonded together.

This is the form nitrogen takes in Earth's atmosphere, where it makes up about 78% of the air we breathe.

The notation appears in scientific and technical contexts: N2 gas is used to preserve food packaging.

molecule

dinitrogen

Two-atom molecule, element seven

diatomicHaving two atoms
covalentSharing electrons between atoms
nonmetalElement without conductivity

valence · stable · reactivity · spectroscopy

inert

argon

Unreactive element eighteen

heliumLightest noble gas
neonInert illuminating element
shieldingProtecting from harm

welding · blanketing · purging · nonreactive · cryogenics · insulation

atmosphere

air

Gaseous envelope surrounding Earth

oxygenElement eight, colorless gas
troposphereLowest atmospheric layer
stratosphereSecond atmospheric layer up

mesosphere · thermosphere · exosphere · climate · weather · altitude · barometer · meteorology · aviation · wind

biological

proteins

Amino acid polymers

nucleotidesDNA and RNA subunits
DNAHereditary code molecule
legumesEdible pod-bearing plants

fertilizer · ammonia · chlorophyll · biomolecule · agricultural · decomposition · denitrification

industrial

cryopreservation

Low-temperature biological preservation

semiconductorPartial electrical conductor
pressurizationRaising internal atmospheric force
pneumaticUsing pressurized gas

refrigerant · pharmaceutical

Categories

sleepsleep, sleeping, nap, doze, slumber
gasesgas, air, oxygen, helium, hydrogen
Chemical FormulasH2O, CO2, NaCl, O2, H2
Cancer Stagingstaging, stage 1, stage 2, stage 3, stage 4
Diatomic MoleculesH2, O2, CO, NO, HF
Evoked PotentialsERP, SEP, MEP, P1, CDA

Opposites

atmospheric composition

N2O2

Molecular oxygen gas

oxygen · breathable air · CO2 · water vapor · carbon dioxide

chemical reactivity

Pale yellow halogen gas

oxygen · O2 · chlorine · ozone · oxidizers

Family

nitrogen, nitrogenous, nitrate, nitrates, nitric, nitrite, nitrites, nitro, nitroglycerin

Familiarity: Top 1,000,000
Profile: Used worldwide · Timeless · Concrete · Rated G