Webster's Revised Unabridged Dictionary (1913)
A colorless nonmetallic element, tasteless and odorless, comprising four fifths of the atmosphere by volume. It is chemically very inert in the free state, and as such is incapable of supporting life (hence the name azote still used by French chemists); but it forms many important compounds, as ammonia, nitric acid, the cyanides, etc, and is a constituent of all organized living tissues, animal or vegetable. Symbol N. Atomic weight 14. It was formerly regarded as a permanent noncondensible gas, but was liquefied in 1877 by Cailletet of Paris, and Pictet of Geneva.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version
\ni`tro*gen\ (?), n. [l. nitrum natron + -gen: cf. f. nitrogène. see niter.] (chem.) a colorless nonmetallic element, tasteless and odorless, comprising four fifths of the atmosphere by volume. it is chemically very inert in the free state, and as such is incapable of supporting life (hence the name azote still used by french chemists); but it forms many important compounds, as ammonia, nitric acid, the cyanides, etc, and is a constituent of all organized living tissues, animal or vegetable. symbol n. atomic weight 14. it was formerly regarded as a permanent noncondensible gas, but was liquefied in 1877 by cailletet of paris, and pictet of geneva.
n : 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 [syn: n, atomic number 7]
symbol: n atomic number: 7 atomic weight: 14.0067 colourless, gaseous element which belongs to group 15 of the periodic table. constitutes ~78% of the atmosphere and is an essential part of the ecosystem. nitrogen for industrial purposes is acquired by the fractional distillation of liquid air. chemically inactive, reactive generally only at high temperatures or in electrical discharges. it was discovered in 1772 by d. rutherford.
protoxide of nitrogen
Chemistry of the Elements
Atomic number: 7
Atomic weight: 14.00674 (7) g r
Group in periodic table: 15
Group name: Pnictogen
Period in periodic table: 2
Block in periodic table: p-block
CAS registry ID: 7727-37-9
Nitrogen is a Group 15 element. Nitrogen makes up about 78% of the atmosphere by volume but the atmosphere of Mars contains less than 3% nitrogen. The element seemed so inert that Lavoisier named it azote, meaning "without life". However, its compounds are vital components of foods, fertilizers, and explosives. Nitrogen gas is colourless, odourless, and generally inert. As a liquid it is also colourless and odourless.
When nitrogen is heated, it combines directly with magnesium, lithium, or calcium. When mixed with oxygen and subjected to electric sparks, it forms nitric oxide (NO) and then the dioxide (NO2). When heated under pressure with hydrogen in the presence of a suitable catalyst , ammonia forms (Haber process). Nitrogen is "fixed" from the atmosphere by bacteria in the roots of certain plants such as clover. Hence the usefulness of clover in crop rotation.
General Chemistry Glossary
(N) Element number 7, a colorless, odorless, tasteless gas that makes up about 80% of the earth's atmosphere.
Integrated Circuit Terminology
atomic symbol, N, nitrogen is the 7th element in the periodic table (atomic number 7), with an atomic weight of 14.01. Nitrogen is a group VB element and is relatively inert. Nitrogen is widely used during IC processing as an inert purge gas due to it's low cost, but must be used carefully because it will react under certain circumstances. For example, at >950oC nitrogen will thermally react with silicon to form silicon nitride in an oxygen starved environment. A small amount of oxygen is commonly added during furnace ramp-up and ramp-down in nitrogen when 950oC temperatures will be exceeded to suppress silicon nitride formation.
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Environmental Engineering (English ver.)
(1) (General) Chemical symbol N, the gaseous, essential element for plant growth, comprising 78 percent of the atmosphere, which is quite inert and unavailable to most plants in its natural form. (2) (Water Quality) A nutrient present in ammonia, nitrate or nitrite or elemental form in water due possibly to Nonpoint Source (NPS) pollution or improperly operating wastewater treatment plants.
Nitrogen Used to denote the familiar earthly element, and also its noumenon, of which it is the terrestrial manifestation. Thus, when air is said to stand for nitrogen in the enumeration of the four elements and when that which on earth is nitrogen is called the Son in the trinity Father-Mother-Son, it is evidently the noumenon which is meant (SD 1:253, 623). Nitrogen is also correlated with linga-sarira among the four lower principles.
Nitrogen plays the part of a vehicle, so far as oxygen of the air is concerned, but plays an extremely important part in plant life. The elements on earth are compound, being several generations below their original parents; and the gross elements contain all the subtle elements, but differ from each other in that each contains one of the subtle elements in a predominant proportion. It is often the subtle element that is meant when the word nitrogen is used in The Secret Doctrine.