Nitrogen – Atomic Mass – Atomic Weight – N
Alternative Titles: N, azote. Nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth ’s atmosphere and is a constituent of all living matter. nitrogen Encyclop?dia Britannica, Inc. Element Nitrogen (N), Group 15, Atomic Number 7, p-block, Mass Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Jump to main content.
Nitrogen Nwhat is a nitrogen atom element of Group 15 [Va] of the periodic table. At about the same time, nitrogen also was recognized by a Scottish botanist, Daniel Rutherford who what is a nitrogen atom the first to publish his findingsby the British chemist Henry Cavendishand by the British what is a nitrogen atom and scientist Joseph Priestleywho, with Scheele, is given credit for the discovery of oxygen.
Later work showed the new gas to be a constituent of nitre, a common name for potassium nitrate KNO 3and, accordingly, it was named nitrogen by the French chemist Jean-Antoine-Claude Chaptal in Nitrogen first was considered a chemical element by Antoine-Laurent Lavoisierwhose explanation of the role of oxygen in combustion eventually overthrew the phlogiston theory, an erroneous view of combustion that became popular in the early 18th century.
The inability of nitrogen to support life Greek: zoe led Lavoisier to name it azotestill the French equivalent of nitrogen. Among the elements, nitrogen ranks sixth in cosmic abundance. The atmosphere of Earth consists of The atmosphere also contains varying small amounts of ammonia and ammonium salts, as well as nitrogen oxides and nitric acid the latter substances being formed in electrical storms and in the internal combustion engine.
Free nitrogen is found in many meteorites; in gases of volcanoes, mines, and some mineral springs; in the Sun; and in some stars and nebulae. Nitrogen also occurs in mineral deposits of nitre or saltpetre potassium nitrate, KNO 3 and Chile saltpetre sodium nitrate, NaNO 3what is a nitrogen atom these deposits exist in quantities that are wholly inadequate for human needs.
Another material rich in nitrogen is guanofound in bat caves and in dry places frequented by birds. Nitrogen constitutes on the average about 16 percent by weight of the complex organic compounds known as proteins, present in all living organisms.
The cosmic abundance—the estimated how to cast resin jewelry abundance in the universe—is between three and seven atoms per atom of siliconwhich is taken as the standard. India, Russia, the United States, Trinidad and Tobagoand Ukraine were the top five producers of nitrogen in the form of ammonia in the early 21st century.
Commercial production of nitrogen is largely by fractional distillation of liquefied air. Nitrogen can also be produced on a large scale by burning carbon or hydrocarbons in air and separating the resulting carbon dioxide and water from the residual nitrogen. On a small scale, pure nitrogen is made by heating barium azideBa N 3 2.
Various laboratory reactions that yield nitrogen include heating ammonium nitrite NH 4 NO 2 solutions, oxidation of ammonia by bromine water, and oxidation of ammonia by hot cupric oxide. Elemental nitrogen can be used as an inert atmosphere for reactions requiring the exclusion of oxygen and moisture. In the liquid statenitrogen has valuable cryogenic applications; except for the gases hydrogenmethane, carbon monoxidefluorineand oxygen, practically all chemical substances have negligible vapour pressures at the boiling point of nitrogen and exist, therefore, as crystalline solids at that temperature.
In the chemical industrynitrogen is used as a preventive of oxidation or other deterioration of a product, as an inert diluent of a reactive gas, as a carrier to remove heat or chemicals and as an inhibitor of fire or explosions. In the food industry nitrogen gas is employed to prevent spoilage through oxidation, mold, or insects, and liquid nitrogen is used for freeze drying and for refrigeration systems.
In the electrical industry nitrogen is used to prevent oxidation and other chemical reactions, to pressurize cable jackets, and to shield motors. Nitrogen finds application in the metals industry in welding, soldering, and brazing, where it helps prevent oxidation, carburization, and decarburization.
As a nonreactive gas, nitrogen is employed to make foamed—or expanded—rubber, plastics, and elastomers, to serve as a propellant gas for aerosol cans, and to pressurize liquid propellants for reaction jets. In medicine rapid freezing with liquid nitrogen may be used to preserve bloodbone marrowtissue, bacteriaand semen.
Liquid nitrogen has also proven useful in cryogenic research. Nitrogen Article Media Additional Info. Article Contents. Home Science Chemistry Nitrogen chemical element. Print print Print. Table Of Contents. While every effort has been made what happens in an irs audit follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
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Chemistry in its element: nitrogen
Nitrogen is one of these heavier atoms, left over when a star smashes together carbon atoms. Nitrogen is not very heavy, though, and a lot of stars make a lot of nitrogen. When a red giant star explodes into a supernova, the nitrogen inside it goes shooting off into space. Jul 06, · Nitrogen is atomic number 7, which means each nitrogen atom has 7 protons. Its element symbol is N. Nitrogen is odorless, tasteless, and colorless gas at room temperature and pressure. Its atomic weight is Nitrogen gas (N 2) makes up % of the volume of the Earth's air. It's the most common uncombined (pure) element on Earth. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere.
Inside a red giant star, the star smashes lighter atoms together. Smashing atoms gets the star energy to burn, and also leaves extra heavier atoms. Nitrogen is one of these heavier atoms, left over when a star smashes together carbon atoms. Nitrogen is not very heavy, though, and a lot of stars make a lot of nitrogen. When a red giant star explodes into a supernova , the nitrogen inside it goes shooting off into space.
It becomes part of a nebula , or cloud of space dust. All of the nitrogen in the universe comes from inside stars. Most of the nitrogen in the universe stays in these nebulae. Nitrogen atoms have five electrons in their outer ring, but they have room for eight electrons there. Often they join up with another nitrogen atom, each sharing electrons to fill up the rings. That makes molecules of two nitrogen atoms. It takes a lot of energy to break up a nitrogen molecule.
But some of the nitrogen in space did become part of larger hydrocarbon molecules called amino acids. When life first evolved on Earth, about three and a half billion years ago, the cells used nitrogen to make protein molecules.
Protein molecules are part of what cells are made of, and they also make RNA and DNA , the genetic material that allows cells to reproduce. When the bacteria that used this nitrogen died, the nitrogen decayed out of their bodies.
Soon more complicated plants evolved that could use this nitrogen too. Plants use nitrogen just like bacteria do, to make amino acids and proteins. Animals , including people, need nitrogen for the same reasons. We get our nitrogen by eating plants like carrots or lettuce, or by eating other animals, like pigs , that ate plants. This site uses Akismet to reduce spam.
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