Solutions manuals and the Numerari scientific calculator from KnowledgeDoor Learn more about our solutions manuals Learn more about Numerari

Element

Element Abundances in the Earth's Atmosphere

Click button to see citations

Notes

Nitrogen

  78.08%   

N2

Oxygen

  20.95%   

O2

Water

  ≈1%      

H2O (highly variable)

Argon

9340 ppm   

Carbon Dioxide

 380 ppm   

CO2

Neon

  18.18 ppm

Helium

   5.24 ppm

Methane

   1.7 ppm 

CH4

Krypton

   1.14 ppm

Hydrogen

   0.55 ppm

H2

Reference    (Click the button next to a value above to see complete citation information for that entry)

National Aeronautics and Space Administration (NASA). Earth Fact Sheet. http://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html. Accessed on September 18, 2011.