The principal constituents of the atmosphere of Earth are nitrogen (78 percent) and oxygen (21 percent). The atmospheric gases in the remaining 1 percent are argon (0.9 percent), carbon dioxide (0.03 percent), varying amounts of water vapor, and trace amounts of hydrogen, ozone, methane, carbon monoxide, helium, neon, krypton, and xenon.
At Sea Level and Standard Temperature and Pressure (STP), average air samples usually contain the following 16 gasses: 78.1% Nitrogen (N2), 21.02% Oxygen (O2), 1 - 5% Water Vapor (H2O), 0.092% Argon (Ar), 0.0314% Carbon Dioxide (CO2), 0.00183% Neon (Ne), 0.00024% Methane (CH4), 0.000524% Helium (He), 0.000114% Krypton (Kr), 0.000047% Hydrogen (H2), 0.0000079% Xenon (Xe), 0.000007% Ozone (O3), 0.000002% Nitrogen Dioxide (NO2), 0.0000011% Iodine (I2), 0.00000021% Carbon Monoxide (CO), 0 - 0.0000006% Ammonia (NH3).
Chemical % by volume
Nitrogen (N2) 78.08
Oxygen (O2) 20.95
Argon (Ar) 0.93
Carbon Dioxide (CO2) 0.033
Other trace elements 0.007
Source is www.scifun.org
78% Oxygen.
21% Nitrogen.
1% Other Noble Gases (e.g. Neon, Argon)
78% nitrogen 20% oxygen 1% argon <0.1% noble gases roughly
Air components: nitrogen-78,074 %, oxygen-20,946 %, argon-0,934 %, carbon dioxide-0,39445 %, neon-0,001818 %, etc.
The percentage of nitrogen in pure, dry ,standard air is 78,084 % (by volume).
About 78% of air is Nitrogen.
21% of the air is oxygen
0.000524%
Approximately 75-80% of the Earth's atmosphere is located in the troposphere. It is the lowest layer of the atmosphere and extends up to about 10-15 kilometers above the Earth's surface.
99%
80%
Somthing
Argon is roughly 0.9% of dry air.
oxygen percentage in air is 20%
Room air is about 21% oxygen.
78% of air breathed is nitrogen