Constituent
Name
Dry standard atmospheric air
Family
gas
Class
molecular gas
Compound type
gas
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0 ± 0.001
Chemical composition
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Mass fraction State Relevance Comments
N2 Nitrogen molecule 78.08 ± 0.01 0.755541926940621 ± 0.000256241361543544 mixed main
O2 Oxygen molecule 20.95 ± 0.01 0.231563743577575 ± 0.000159409012407296 mixed main
Ar Argon atom 0.934 ± 0.001 0.0128882739907044 ± 1.65194051837227e-05 mixed main
Ne Neon atom 1.818e-05 ± 2e-08 1.26724745332234e-07 ± 1.66159627857789e-10 mixed main
CO2 Carbon dioxide molecule 0.00039 ± 0.0001 5.92876635489766e-06 ± 1.52144791754428e-06 mixed main at end 2012, increase 1.2-1.4 ppm/year
Chemical bonds
  Bond Number Relevance
N≡N 1 main
O=O 1 main
=C=O 2 main
Phase type
gas
Texture
gas