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 0.755541926940621 $\pm$ 0.000256241361543544 mixed main
$O_2$ Oxygen molecule 20.95 $\pm$ 0.01 0.231563743577575 $\pm$ 0.000159409012407296 mixed main
$Ar$ Argon atom 0.934 $\pm$ 0.001 0.0128882739907044 $\pm$ 1.65194051837227e-05 mixed main
$Ne$ Neon atom 1.818e-05 $\pm$ 2e-08 1.26724745332234e-07 $\pm$ 1.66159627857789e-10 mixed main
$CO_2$ Carbon dioxide molecule 0.00039 $\pm$ 0.0001 5.92876635489766e-06 $\pm$ 1.52144791754428e-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