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 0.7555419269406206 ± 0.00025624136154354395 mixed main
O2 Oxygen molecule 20.95 ± 0.01 0.23156374357757475 ± 0.00015940901240729582 mixed main
Ar Argon atom 0.934 ± 0.001 0.01288827399070442 ± 1.6519405183722737e-05 mixed main
Ne Neon atom 1.818e-05 ± 2e-08 1.267247453322339e-07 ± 1.6615962785778924e-10 mixed main
CO2 Carbon dioxide molecule 0.00039 ± 0.0001 5.928766354897665e-06 ± 1.5214479175442812e-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