Nitrogen is a chemical element with symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772. It is the fifth most abundant element in the universe and makes up about 78% of the atmosphere of Earth.

Atomic Weight:  14.007
Density:        1.251 g/l
Melting Point:  -210.1 °C
Boiling Point:  -195.79 °C