Sea-Level Composition of Air

(in percent by volume at the temperature of 15°C and the pressure of 101325 Pa)

NameSymbolPercent by Volume
Nitrogen N2 78.084 %
OxygenO220.9476 %
ArgonAr0.934 %
Carbon DioxideCO20.0314 %
NeonNe0.001818 %
MethaneCH40.0002 %
HeliumHe0.000524 %
KryptonKr0.000114 %
HydrogenH20.00005 %
XenonXe0.0000087 %

Search

Loading






Science Quote

'Science is a refinement of everyday thinking.'

Albert Einstein
(1879-1955)

Top Selling

Here are our physics & astronomy bestsellers:
Magnetic Levitator - Classic
KonusScience 5 Way Microscope Kit
Periscope
Space Wonder Gyroscope
CHEM C2000 Chemistry SuperKit v2.0
Snap Circuits Jr.
Solar Radiometer
Mini Plasma Ball
Smart Robot 4M Kit
130 Electronics Projects Kit

Sponsors

USC University of Southern California Dornsife College Physics and Astronomy Department McMaster University Physics and Astronomy Department