60% Nitrogen, 40%inert gases
Source: This question is taken from the Everyday Science
78% Nitrogen
Hydrogen, Helium
Mineral
Calcium oxalate
Methane, Butane and Propane
Ice and dust
21% Oxygen approximately
Oxygen
A class of nucleic acids
Two Protons and two Neutrons
All of above
0.03 to 0.04% CO2
50 km to 85 km
smallest particle of an element which can undergo a chemical reaction