Nitrogen fixation would have evolved whenever the demand of fixed nitrogen exceeded the supply. Nitrogen is an essential element for life. It is present in all living systems, occurring in several important molecules including proteins and nucleic acids. As a consequence, the origin of the nitrogen...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook N2 (redirected fromnitrogen) Dictionary Thesaurus Medical Financial Encyclopedia Wikipedia Related to nitrogen:liquid nitrogen,nitrogen cycle,oxygen AcronymDefinition ...
What is a free radical? Atom: The smallest part of a living or non-living thing consists of a central nucleus surrounded by one or more electrons is called an atom. The number of protons present in the nucleus of an atom is designated as an atomic number of an element and it is ...
Nitrogen is a gas. Byanon161881— On Mar 21, 2011 So is nitrogen a solid, liquid, or gas? That's all i want to know. Byanon48387— On Oct 12, 2009 Anon46939: Nitrogen is not compoosed of raw materials. It is an element. Therefore, it *is* the raw material. ...
Nitrogen is an odorless, colorless gas symbolized by the letter N on the periodic table. Nitrogen has a wide range of uses, ranging from medical research to food packaging. All commercially obtained chemicals are really mixtures, though highly pure chemi
Nitrogen (N) is an element located in the second row and the third last column of the periodic table. This column is located near the far right side...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your ...
As an important element required in the synthesis of many organic compounds, nitrogen serves as the limiting nutrient in many ecosystems. Most organisms lack the ability to utilize nitrogen gas as a source of nitrogen; however, through a process known as nitrogen fixation, some agriculturally import...
What is the element that enables the ceramic tape to lower its temperature? A. Copper.(铜) B. Liquid nitrogen.(液态氮) C. Clay.(陶土) D. Calcium(钙) 如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: B 复制 纠错 举一反三 水蒸汽...
Urea is rich of nitrogen. And it is cheaper than melamine. When the liquid milk is heated to become milk powder, the urea nitrogen is changed to melamine. That is why the milk powder is tainted by melamine. Isn't that talented? I think the next Nobel Prize should go for the creation...
let us look at the valency of the first 30 elements of the periodic table. element atomic number valency valency of hydrogen 1 1 valency of helium 2 0 valency of lithium 3 1 valency of beryllium 4 2 valency of boron 5 3 valency of carbon 6 4 valency of nitrogen 7 3 valency of ...