What is nitrogen?

  • (noun): A common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues.
    Synonyms: N, atomic number 7


Nitrogen is a chemical element with symbol N and atomic number 7. Elemental nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions, constituting 78.09% by volume of Earth's atmosphere. The element nitrogen was discovered as a separable component of air, by Scottish physician Daniel Rutherford, in 1772. It belongs to the pnictogen family.

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Some articles on nitrogen:

Lonar Crater Lake - Lake Ecosystem - Nitrogen Fixing Microorganisms
... Nonsymbiotic nitrogen fixing microorganisms such as Halomonas sp ... All the nitrogen fixers are haloalkaliphilic in nature as they can grow only at pH-11 ...
Lifting Gas - Gases That Are Probably Suitable For Lifting - Nitrogen
... Pure nitrogen has the advantage that it is inert and abundantly available, because it is the major component of air ... However, because nitrogen is only 3% lighter than air, it is not an obvious choice for a lifting gas ... Emulsion agar gel) has been produced that floats in air if it is filled with pure nitrogen ...
Transition Metal Dinitrogen Complex
... chemistry, the atomic and diatomic forms of nitrogen are distinguished, although otherwise "nitrogen" refers to N2 ... N2 comprises the majority of the atmosphere and because many useful compounds contain nitrogen atoms ... Biological nitrogen fixation probably occurs via the binding of N2 to a metal center in the enzyme nitrogenase, followed by a series of steps that ...
Nitrogen - Safety
... Rapid release of nitrogen gas into an enclosed space can displace oxygen, and therefore represents an asphyxiation hazard ... into a space located in the Shuttle's Mobile Launcher Platform that was pressurized with pure nitrogen as a precaution against fire ... to exit the room if they had experienced early symptoms from nitrogen-breathing ...
Soil Respiration - Importance - Nutrient Cycling
... During decomposition, nutrients, such as nitrogen, are immobilized by microbes for their own growth ... As these microbes are ingested or die, nitrogen is added to the soil ... Nitrogen is also mineralized from the degradation of proteins and nucleic acids in litter ...