Nitrogen is the most abundant gas in the earth’s atmosphere.
Disregarding water vapor, which varies with humidity, nitrogen makes up 78% of all the air we breathe.
Nitrogen is a colorless, odorless, tasteless and inert gas, and was discovered by Scottish physician Daniel Rutherford, in 1772.
Nitrogen gas was inert enough that Antoine Lavoisier called it a “mephitic air” or azote, which comes from the Greek word άζωτος (azotos), which mean “lifeless”.
Oxygen makes up about 21%.
The remaining 1% consists chiefly of argon, with only extremely small amounts of other gases.