Chem4s.com! This tutorial introduces the periodic table. Other sections include matter, elements, reactions, and biochemistry.
Nitrogen is a chemical element with symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772. Although Carl Wilhelm Scheele and Henry Cavendish had independently done so at about the same time, Rutherford is generally accorded the credit because his work was published first.
where, Q st denotes the volume of injected nitrogen (the volume at zero gauge pressure and actual temperature) in the commissioning process, m 3; L ni denotes the length of the trunk line corresponding to the volume of injected nitrogen at 0.02 Mpa gauge reading and actual temperature, km; L total denotes the total length of the trunk line, km
Morphine: Morphine, narcotic analgesic drug used in medicine in the form of its hydrochloride, sulfate, acetate, and tartrate salts. Morphine was isolated from opium by the German chemist F.W.A. Sertürner in about 1804.
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Nitrogen-doped carbon materials are reviewed by focusing on their preparation and applications. Their preparation is described in the order of graphene, carbon nanotube and fibers, porous carbons and carbon blacks, because the investigations working on graphene have taught us many fundamental information on N-doping, though …
A pnictogen / ˈ n ɪ k t ə dʒ ə n / is one of the chemical elements in group 15 of the periodic table.This group is also known as the nitrogen family.It consists of the elements nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi), and perhaps the chemically uncharacterized synthetic element moscovium (Mc).
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.