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 $\pm$ 0.001
Chemical composition
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Mass fraction State Relevance Comments
$N_2$ Nitrogen molecule 78.08 $\pm$ 0.01 0.7555419269406206 $\pm$ 0.00025624136154354395 mixed main
$O_2$ Oxygen molecule 20.95 $\pm$ 0.01 0.23156374357757475 $\pm$ 0.00015940901240729582 mixed main
$Ar$ Argon atom 0.934 $\pm$ 0.001 0.01288827399070442 $\pm$ 1.6519405183722737e-05 mixed main
$Ne$ Neon atom 1.818e-05 $\pm$ 2e-08 1.267247453322339e-07 $\pm$ 1.6615962785778924e-10 mixed main
$CO_2$ Carbon dioxide molecule 0.00039 $\pm$ 0.0001 5.928766354897665e-06 $\pm$ 1.5214479175442812e-06 mixed main at end 2012, increase 1.2-1.4 ppm/year
Chemical bonds
  Bond Number Relevance
$N\equiv N$ 1 main
$O=O$ 1 main
$=C=O$ 2 main
Phase type
gas
Texture
gas