百度试题 结果1 题目Which of the following is a compound? A. Oxygen B. Hydrogen C. Water D. Nitrogen 相关知识点: 试题来源: 解析 C。水(Water)是化合物。氧气(Oxygen)、氢气(Hydrogen)和氮气(Nitrogen)都是单质。
nitrogen - 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 atomic number 7, N chemical element, element - any of the more than 100 known substances (of which...
(redirected fromnitrogenisation) Thesaurus ni·trog·en·ize (nī-trŏj′ə-nīz′, nī′trə-jə-) tr.v.ni·trog·en·ized,ni·trog·en·iz·ing,ni·trog·en·iz·es To combine or treat with nitrogen or a nitrogen compound. ...
Molecular nitrogen (14N2) is largely transparent to infrared and visible radiation because it is a homonuclear molecule and thus has no dipole moment to couple to electromagnetic radiation at these wavelengths. Significant absorption occurs at extreme ultraviolet wavelengths, beginning around 100 nanomete...
Nitrogen is an essential compound of many molecules, including proteins, nucleic acids and vitamins. Associations of eukaryotic host organisms with nitrogen-fixing bacteria occur in many environments and have thus increased the bioavailability of nitrogen. These associations are numerous and diverse, ...
Fabaceae, pea family of flowering plants (angiosperms), within the order Fabales. Fabaceae, which is the third largest family among the angiosperms after Orchidaceae (orchid family) and Asteraceae (aster family), consists of more than 700 genera and abou
Triaminoguanidine is a kind of non-azide nitrogen-rich flammable compound, which has some advantages of high nitrogen, good thermal stability, and high positive formation enthalpy, etc. 摘要三氨基胍是一种非叠类、富型、可燃性化合物,其系列含能化合物具有高的正生成焓、热稳定性好、含量高等特点。
NEW MATERIAL:The nitrogen-containing compound of formula I (R is 1-10C alkyl or alkoxy; A is -CH2CH2- or single bond; X and Y are F or Cl). EXAMPLE:2-[beta-(3,4-Difluorophenyl)ethyl]-5-n-pentylpyridine. USE:Useful as a component of liquid crystal composition. It has excellent ...
Ammonia (NH3) is the first binary molecule discovered in outer space of our galaxy, theMilky Way. It may also be the main compound that forms the rings of the planet Saturn. CharacteristicsThere are approximately 4,000 trillion tons of gas in the atmosphere, and nitrogen makesup about 78%...
Ammonia is used in the ammonia-soda process (Solvay process) to produce soda ash, Na2CO3. Ammonia is also used in the preparation of hydrazine, N2H4, a colourless liquid used as a rocket fuel and in many industrial processes. Nitric acid is another popular commercial compound of nitrogen. A...