NitrogenNITROGEN is a chemical element that has the symbol N and atomic number 7 and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless and mostly inert diatomic gas at standard conditions, constituting 78% by volume of Earth's atmosphere.Chemical Business group...
SYMB:NA colorless, odorless, tasteless, gaseous chemical element, atomic weight (mass) 14.0067, atomic number 7. It occurs free in the atmosphere and forms approx. 80% of the volume of the atmosphere. CAS # 7727-37-9 A component of all proteins, nitrogen is essential to plant and animal...
作者: V Thiel 摘要: Nitrogen is a nonmetal element with atomic number 7 and atomic mass of 14.00674 u. It was discovered in 1772 by Daniel Rutherford (1749–1819), a Scottish physician, botanist and chemist (Weeks, 1934). DOI: 10.1007/978-1-4020-9212-1_157 收藏...
Nitrogen is a chemical element that has the symbol N, atomic number of 7 and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless and mostly inert diatomic gas at standard conditions, constituting 78.08% by volume of Earth's atmosphere. Many industrially important compoun...
Nitrogen occurs in all organisms, primarily in amino acids (and thus proteins), in the nucleic acids (DNA and RNA) and in the energy transfer molecule adenosine triphosphate. The human body contains about 3% nitrogen by mass, the fourth most abundant element in the body after oxygen, carbon,...
By number of atoms, it is the fifth most abundant element in the universe (by mass, it is seventh). The chemical symbol for nitrogen is N, and its normal molecular form, N2 (i.e. a molecule made up of two nitrogen atoms). Its atomic mass is most commonly 14 and its atomic number...
The atomic number of nitrogen is 7. Nitrogen has a total of 7 protons, 8 neutrons and 7 electrons. The atomic mass of nitrogen is 14 amu (atomic mass unit). Figure 2: The symbol of nitrogen is N Figure 3: Nitrogen has a total of seven electrons; two in the inner orbital and the...
Nitrogen was first recognized by Scheele (1772) as the inactive constituent of air, and was subsequently named for its occurrence in niter. Its atomic number is 7, relative atomic mass 14.007, electron configuration 2s22p3, principal oxidation states −III, +III and +V. It has two naturally...
(seenitro-) + Frenchgène"producing," from Greek-gen"giving birth to" (see-gen). The gas was identified in part by analysis of nitre. An earlier name for it wasmephitic air(1772), and Lavoisier called itazote(seeazo-). It forms about 78% of the weight of the Earth's atmosphere. ...
These include but are not limited to enhanced mass transfer, improved electronic conductivity, and greater corrosion resistance [89–92]. Recent syntheses of vertically aligned N-CNTs (Figure 5a) were able to produce ORR activity comparable to that of Pt/C catalysts in alkaline media (Figure 5b...