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...
PROBLEM TO BE SOLVED: To provide a nitrogen compound semiconductor element (such as light emitting diode or semiconductor laser) which can be fabricated in simple manufacturing steps with a good yield, since the compound can be easily cleaved in two directions perpendicular to each other.YAMAGUCHI ...
Nitrogen definition: a colorless, odorless, gaseous element that constitutes about four-fifths of the volume of the atmosphere and is present in combined form in animal and vegetable tissues, especially in proteins: used chiefly in the manufacture of amm
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。
" That question is difficult to answer for a number of reasons. First, air cannot really be "seen." In fact, it took chemists many years to figure out how to capture air so that they could study it. Also, is ordinary "air" an element or a compound? For many centuries, philosophers...
Element Properties atomic number 7 atomic weight 14.0067 melting point −209.86 °C (−345.8 °F) boiling point −195.8 °C (−320.4 °F) density (1 atm, 0° C) 1.2506 grams/litre usual oxidation states −3, +3, +5 electron configuration 1s22s22p3History...
In this explainer, we will learn how to describe and explain the properties and reactions of the element nitrogen. Nitrogen is arguably the most well-known group 15 element. It is slightly soluble in water, but its solubility does depend on the surrounding temperature and pressure. It is the...
Nitrogen is the largest single constituent of the Earth's atmosphere (78.082% by volume of dry air, 75.3% by weight in dry air). It is created by fusion processes in stars, and is estimated to be the 7th most abundant chemical element by mass in the universe.[9] ...
and nitrogen or nitrogen oxides. Any other element that may be present passes into its highest state of oxidation: sulphur, for instance, becomes sulphuric acid; phos-phorus, phosphoric, &c. Very remarkable is the action of real nitric acid, when employed in the cold, and under conditions pr...
Noun1.nitrogen mustard- a toxic compound resembling mustard gas in structure; important in cancer treatment chemical compound,compound- (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight ...