Nitrogen Elemental Symbol
Nitrogen



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Azote Stickstoff Azoto Nitrogênio Nitrógeno Kväve

Nitrogen element symbolNitrogen is a Block P, Group 15, Period 2 element. Its electron configuration is [He]2s22p3. In its elemental form, nitrogen's CAS number is7727-37-9. Nitrogen is an odorless, tasteless, colorless and mostly inert gas. It is the seventh most abundant element in the universe and it constitutes 78.09% (by volume) of Earth's atmosphere. Nitrogen was discovered by Daniel Rutherford in 1772.

Nitrogen information, including technical data, safety data and its high purity properties, research, applications and other useful facts are specified below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included. See the Chemicals Information Center for additional information. For additional information please see the Chemeicals Information Center.


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Nitrogen Properties


GENERAL PROPERTIES   PHYSICAL PROPERTIES  
Symbol: N Melting Point: -210 oC, -346 oF, 63.15 K
Atomic Number: 7 Boiling Point: -195.795 oC, -320.431 oF, 77.355 K
Atomic Weight: 14.01 Density: (0 °C, 101.325 kPa) 1.251 g/L
Element Category: nonmetal Liquid Density @ Melting Point: 0.808 g·cm−3
Group, Period, Block: 15 (pnictogens), 2, p Specific Heat: N/A
    Heat of Vaporization 5.56 kJ·mol−1
CHEMICAL STRUCTURE Heat of Fusion 0.72 kJ·mol−1
Electrons: 7 Thermal Conductivity: 25.83 × 10−3 W·m−1·K−1
Protons: 7 Thermal Expansion: N/A
Neutrons: 7 Electrical Resistivity: N/A
Electron Configuration: [He]2s22p3 Electronegativity: 3.04 (Pauling scale)
Atomic Radius: N/A Tensile Strength: N/A
Covalent Radius: 71±1 pm Molar Heat Capacity: 29.124 J·mol−1·K−1
Van der Waals radius: 155 pm Young's Modulus: N/A
Oxidation States: 5, 4, 3, 2, 1, −1, −2, −3 (strongly acidic oxide) Shear Modulus: N/A
Phase: Gas Bulk Modulus: N/A
Crystal Structure: hexagonal Poisson Ratio: N/A
Magnetic Ordering: diamagnetic Mohs Hardness: N/A
1st Ionization Energy: 1402.3 kJ·mol−1 Vickers Hardness: N/A
2nd Ionization Energy: 2856 kJ·mol−1 Brinell Hardness: N/A
3rd Ionization Energy: 4578.1 kJ·mol−1 Speed of Sound: gas, 27 °C) 353 m·s−1
       
IDENTIFIERS   MISCELLANEOUS  
CAS Number: 7727-37-9 Abundance in typical human body, by weight: N/A
ChemSpider ID: 20473555 Abundance in typical human body, by atom: N/A
PubChem CID: 947 Abundance in universe, by weight: N/A
MDL Number: MFCD00011416 Abundance in universe, by atom: N/A
EC Number: 231-783-9 Discovered By: Daniel Rutherford
Beilstein Number: N/A Discovery Date: 1772
SMILES Identifier: N  
InChI Identifier: InChI=1S/N Other Names: Azote, Stickstoff, Azoto, Nitrogênio
InChI Key: QJGQUHMNIGDVPM-UHFFFAOYSA-N  
       
       
       
       
       

Nitrogen Products



Recent Research & Development for Nitrogen

  • Nitrogen Dioxide and Ultrafine Particles Dominate the Biological Effects of Inhaled Diesel Exhaust Treated by a Catalyzed Diesel Particulate Filter. Karthikeyan S, Thomson E, Kumarathasan P, Guénette J, Rosenblatt D, Chan T, Rideout G, Vincent R. Toxicol Sci. 2013 Jul 28. [Epub ahead of print]
  • Nitrogen enriched mesoporous carbon as a high capacity cathode in lithium-oxygen batteries. Nie H, Zhang H, Zhang Y, Liu T, Li J, Lai Q. Nanoscale. 2013 Jul 29. [Epub ahead of print]
  • A multi-isotope approach for estimating industrial contributions to atmospheric nitrogen deposition in the Athabasca oil sands region in Alberta, Canada. Proemse BC, Mayer B, Fenn ME, Ross CS. Environ Pollut. 2013 Jul 26;182C:80-91. doi: 10.1016/j.envpol.2013.07.004. [Epub ahead of print]
  • Enhancing the biodegradation of oil in sandy sediments with choline: A naturally methylated nitrogen compound. Mortazavi B, Horel A, Anders JS, Mirjafari A, Beazley MJ, Sobecky PA. Environ Pollut. 2013 Jul 26;182C:53-62. doi: 10.1016/j.envpol.2013.06.022. [Epub ahead of print]
  • N-terminal Processing of Membrane-targeted MnSOD and formation of multiple active SOD dimers in the nitrogen-fixing cyanobacterium, Anabaena sp strain PCC7120. Raghavan PS, Rajaram H, Apte SK. FEBS J. 2013 Jul 30. doi: 10.1111/febs.12455. [Epub ahead of print]
  • Global Transcriptional Responses of the Toxic Cyanobacterium, Microcystis aeruginosa, to Nitrogen Stress, Phosphorus Stress, and Growth on Organic Matter. Harke MJ, Gobler CJ. PLoS One. 2013 Jul 23;8(7):e69834. doi: 10.1371/journal.pone.0069834. Print 2013.
  • Microencapsulated lysine and low-protein diets: Effects on performance, carcass characteristics and nitrogen excretion in heavy growing-finishing pigs. Prandini A, Sigolo S, Morlacchini M, Grilli E, Fiorentini L. J Anim Sci. 2013 Jul 26. [Epub ahead of print]
  • Investigation of malic acid production in Aspergillus oryzae under nitrogen starvation conditions. Knuf C, Nookaew I, Brown SH, McCulloch M, Berry A, Nielsen J. Appl Environ Microbiol. 2013 Jul 26. [Epub ahead of print]
  • Hydrogenotrophic denitrification for tertiary nitrogen removal from municipal wastewater using membrane diffusion packed-bed bioreactor. Li P, Xing W, Zuo J, Tang L, Wang Y, Lin J. Bioresour Technol. 2013 Jun 28. doi:pii: S0960-8524(13)00989-9. 10.1016/j.biortech.2013.06.070. [Epub ahead of print]
  • Potential biomarkers of exposure and effect among glass craftsmen and braziers exposed to nitrogen oxides. Mansur R Azari Faith M Williams Peter G Blain John W Edwards. Biomarkers. 1997;2(6):349-54. doi: 10.1080/135475097231436.
  • Oceans. How nitrogen is lost. Ward BB. Science. 2013 Jul 26;341(6144):352-3. doi: 10.1126/science.1240314. No abstract available.
  • Programmed cell death in the marine cyanobacterium Trichodesmium mediates carbon and nitrogen export. Bar-Zeev E, Avishay I, Bidle KD, Berman-Frank I. ISME J. 2013 Jul 25. doi: 10.1038/ismej.2013.121. [Epub ahead of print]
  • Decomposition and nitrogen dynamics of 15N-labeled leaf, root, and twig litter in temperate coniferous forests. van Huysen TL, Harmon ME, Perakis SS, Chen H. Oecologia. 2013 Jul 25. [Epub ahead of print]
  • The nitrogen footprint in China: food, energy and non-food goods. Gu B, Leach A, Ma L, Galloway JN, Chang SX, Ge Y, Chang J. Environ Sci Technol. 2013 Jul 24. [Epub ahead of print]
  • Growing Catenated Nitrogen Atom Chains. Zhang Q, Shreeve JM. Angew Chem Int Ed Engl. 2013 Jul 23. doi: 10.1002/anie.201303297. [Epub ahead of print]
  • Enhanced photosynthesis and nitrogen fixation under turbulent and aerobic conditions. [No authors listed] Biotechnol Bioeng. 2013 Sep;110(9):fmvi. doi: 10.1002/bit.24682. No abstract available.
  • Porous Nitrogen-Doped Carbon Nanotubes Derived from Tubular Polypyrrole for Energy-Storage Applications. Xu G, Ding B, Nie P, Shen L, Wang J, Zhang X. Chemistry. 2013 Jul 23. doi: 10.1002/chem.201301352. [Epub ahead of print]
  • A review of nitrous oxide mitigation by farm nitrogen management in temperate grassland-based agriculture. Li D, Watson CJ, Yan MJ, Lalor S, Rafique R, Hyde B, Lanigan G, Richards KG, Holden NM, Humphreys J. J Environ Manage. 2013 Jul 20;128C:893-903. doi: 10.1016/j.jenvman.2013.06.026. [Epub ahead of print]
  • Effects of total ammonia nitrogen concentration on solid-state anaerobic digestion of corn stover. Wang Z, Xu F, Li Y. Bioresour Technol. 2013 Jul 2;144C:281-287. doi: 10.1016/j.biortech.2013.06.106. [Epub ahead of print]
  • Nitrogen-Doped Graphene Sheets Grown by Chemical Vapor Deposition: Synthesis and Influence of Nitrogen Impurities on Carrier Transport. Lu YF, Lo ST, Lin JC, Zhang W, Lu JY, Liu FH, Tseng CM, Lee YH, Liang CT, Li LJ. ACS Nano. 2013 Jul 23. [Epub ahead of print]


Nitrogen Isotopes


Nitrogen has two stable isotopes: 14N and 15N.

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
14N 14.0030740048 Stable 1+
15N 15.0001088982 Stable 1/2-