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Nitrogen is a nonmetal that was discovered by a person named Daniel Rutherford in the year 1772, and was first synthesized by Fritz Haber in 1905. Nitrogen is a chemical element with the symbol N and atomic number of 7, which means it has 7 protons & electrons. Nitrogen also has the atomic weight of 14.0067 and tends to be found in a gas state of matter. You can find Nitrogen in Group 15 (P-Block) and in Period 2.


Nitrogen has 12 isotopes whose half-lives are known, with mass numbers 11 to 19. Naturally occurring nitrogen is a mixture of two isotopes, 14N and 15N with natural abundances of 99.6% and 0.4% respectively. The number of neutrons in its most abundant isotope is 7.

Nitrogen is a colorless, odorless, tasteless, diatomic and generally inert gas at standard temperature and pressure.

At atmospheric pressure, nitrogen is liquid between 63 K and 77 K.

Liquids colder than this are considerably more expensive to make than liquid nitrogen is.

Main article: Amino acids

Amino acids are the building blocks of proteins.

Main article: Daniel Rutherford

Daniel Rutherford (1749 - 1819) was a Scottish chemist working with Joseph Black, putting forth the phlogiston theory. Daniel Rutherford identified the element Nitrogen but named it noxious air or phlogisticated air.


Ammonia, Fertilizers, Nitric Acid, Recover Oil, Petroleum Industries, Refrigerant (Liquid), Welding.

Harmful Effects

Nitrogen is non-toxic under normal conditions. Although direct skin contact with liquid nitrogen causes severe frostbite. Decompression in divers or astronauts can cause the ‘bends’ – a potentially fatal condition when nitrogen bubbles form in the bloodstream.

Nitrogen Cycle

There is also something called the nitrogen cycle. This represents one of the most important cycles found terrestrial ecosystems. Nitrogen is also used by the living organisms to produce a number of complex organic molecules like amino acids. {{cite}

Name Nitrogen
Atomic Number 7
Atomic Weight 14.0067
Symbol N
Melting Point ( °C ) -210
Boiling Point ( °C ) -196
Density (g/cm3) 1.25
Earth crust (%) 0.002%
Discovery (Year) 1772
Group 15 (P-Block)
Electron configuration 1s2 2p3
Ionization energy (eV) 14.5341


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http://www.chemicool.com/elements/nitrogen.html http://en.wikipedia.org/wiki/Nitrogen

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